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/** * Copyright (c) 2014-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */var runtime = (function (exports) {  "use strict";  var Op = Object.prototype;  var hasOwn = Op.hasOwnProperty;  var undefined; // More compressible than void 0.  var $Symbol = typeof Symbol === "function" ? Symbol : {};  var iteratorSymbol = $Symbol.iterator || "@@iterator";  var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";  var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";  function define(obj, key, value) {    Object.defineProperty(obj, key, {      value: value,      enumerable: true,      configurable: true,      writable: true    });    return obj[key];  }  try {    // IE 8 has a broken Object.defineProperty that only works on DOM objects.    define({}, "");  } catch (err) {    define = function(obj, key, value) {      return obj[key] = value;    };  }  function wrap(innerFn, outerFn, self, tryLocsList) {    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;    var generator = Object.create(protoGenerator.prototype);    var context = new Context(tryLocsList || []);    // The ._invoke method unifies the implementations of the .next,    // .throw, and .return methods.    generator._invoke = makeInvokeMethod(innerFn, self, context);    return generator;  }  exports.wrap = wrap;  // Try/catch helper to minimize deoptimizations. Returns a completion  // record like context.tryEntries[i].completion. This interface could  // have been (and was previously) designed to take a closure to be  // invoked without arguments, but in all the cases we care about we  // already have an existing method we want to call, so there's no need  // to create a new function object. We can even get away with assuming  // the method takes exactly one argument, since that happens to be true  // in every case, so we don't have to touch the arguments object. The  // only additional allocation required is the completion record, which  // has a stable shape and so hopefully should be cheap to allocate.  function tryCatch(fn, obj, arg) {    try {      return { type: "normal", arg: fn.call(obj, arg) };    } catch (err) {      return { type: "throw", arg: err };    }  }  var GenStateSuspendedStart = "suspendedStart";  var GenStateSuspendedYield = "suspendedYield";  var GenStateExecuting = "executing";  var GenStateCompleted = "completed";  // Returning this object from the innerFn has the same effect as  // breaking out of the dispatch switch statement.  var ContinueSentinel = {};  // Dummy constructor functions that we use as the .constructor and  // .constructor.prototype properties for functions that return Generator  // objects. For full spec compliance, you may wish to configure your  // minifier not to mangle the names of these two functions.  function Generator() {}  function GeneratorFunction() {}  function GeneratorFunctionPrototype() {}  // This is a polyfill for %IteratorPrototype% for environments that  // don't natively support it.  var IteratorPrototype = {};  IteratorPrototype[iteratorSymbol] = function () {    return this;  };  var getProto = Object.getPrototypeOf;  var NativeIteratorPrototype = getProto && getProto(getProto(values([])));  if (NativeIteratorPrototype &&      NativeIteratorPrototype !== Op &&      hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {    // This environment has a native %IteratorPrototype%; use it instead    // of the polyfill.    IteratorPrototype = NativeIteratorPrototype;  }  var Gp = GeneratorFunctionPrototype.prototype =    Generator.prototype = Object.create(IteratorPrototype);  GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;  GeneratorFunctionPrototype.constructor = GeneratorFunction;  GeneratorFunction.displayName = define(    GeneratorFunctionPrototype,    toStringTagSymbol,    "GeneratorFunction"  );  // Helper for defining the .next, .throw, and .return methods of the  // Iterator interface in terms of a single ._invoke method.  function defineIteratorMethods(prototype) {    ["next", "throw", "return"].forEach(function(method) {      define(prototype, method, function(arg) {        return this._invoke(method, arg);      });    });  }  exports.isGeneratorFunction = function(genFun) {    var ctor = typeof genFun === "function" && genFun.constructor;    return ctor      ? ctor === GeneratorFunction ||        // For the native GeneratorFunction constructor, the best we can        // do is to check its .name property.        (ctor.displayName || ctor.name) === "GeneratorFunction"      : false;  };  exports.mark = function(genFun) {    if (Object.setPrototypeOf) {      Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);    } else {      genFun.__proto__ = GeneratorFunctionPrototype;      define(genFun, toStringTagSymbol, "GeneratorFunction");    }    genFun.prototype = Object.create(Gp);    return genFun;  };  // Within the body of any async function, `await x` is transformed to  // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test  // `hasOwn.call(value, "__await")` to determine if the yielded value is  // meant to be awaited.  exports.awrap = function(arg) {    return { __await: arg };  };  function AsyncIterator(generator, PromiseImpl) {    function invoke(method, arg, resolve, reject) {      var record = tryCatch(generator[method], generator, arg);      if (record.type === "throw") {        reject(record.arg);      } else {        var result = record.arg;        var value = result.value;        if (value &&            typeof value === "object" &&            hasOwn.call(value, "__await")) {          return PromiseImpl.resolve(value.__await).then(function(value) {            invoke("next", value, resolve, reject);          }, function(err) {            invoke("throw", err, resolve, reject);          });        }        return PromiseImpl.resolve(value).then(function(unwrapped) {          // When a yielded Promise is resolved, its final value becomes          // the .value of the Promise<{value,done}> result for the          // current iteration.          result.value = unwrapped;          resolve(result);        }, function(error) {          // If a rejected Promise was yielded, throw the rejection back          // into the async generator function so it can be handled there.          return invoke("throw", error, resolve, reject);        });      }    }    var previousPromise;    function enqueue(method, arg) {      function callInvokeWithMethodAndArg() {        return new PromiseImpl(function(resolve, reject) {          invoke(method, arg, resolve, reject);        });      }      return previousPromise =        // If enqueue has been called before, then we want to wait until        // all previous Promises have been resolved before calling invoke,        // so that results are always delivered in the correct order. If        // enqueue has not been called before, then it is important to        // call invoke immediately, without waiting on a callback to fire,        // so that the async generator function has the opportunity to do        // any necessary setup in a predictable way. This predictability        // is why the Promise constructor synchronously invokes its        // executor callback, and why async functions synchronously        // execute code before the first await. Since we implement simple        // async functions in terms of async generators, it is especially        // important to get this right, even though it requires care.        previousPromise ? previousPromise.then(          callInvokeWithMethodAndArg,          // Avoid propagating failures to Promises returned by later          // invocations of the iterator.          callInvokeWithMethodAndArg        ) : callInvokeWithMethodAndArg();    }    // Define the unified helper method that is used to implement .next,    // .throw, and .return (see defineIteratorMethods).    this._invoke = enqueue;  }  defineIteratorMethods(AsyncIterator.prototype);  AsyncIterator.prototype[asyncIteratorSymbol] = function () {    return this;  };  exports.AsyncIterator = AsyncIterator;  // Note that simple async functions are implemented on top of  // AsyncIterator objects; they just return a Promise for the value of  // the final result produced by the iterator.  exports.async = function(innerFn, outerFn, self, tryLocsList, PromiseImpl) {    if (PromiseImpl === void 0) PromiseImpl = Promise;    var iter = new AsyncIterator(      wrap(innerFn, outerFn, self, tryLocsList),      PromiseImpl    );    return exports.isGeneratorFunction(outerFn)      ? iter // If outerFn is a generator, return the full iterator.      : iter.next().then(function(result) {          return result.done ? result.value : iter.next();        });  };  function makeInvokeMethod(innerFn, self, context) {    var state = GenStateSuspendedStart;    return function invoke(method, arg) {      if (state === GenStateExecuting) {        throw new Error("Generator is already running");      }      if (state === GenStateCompleted) {        if (method === "throw") {          throw arg;        }        // Be forgiving, per 25.3.3.3.3 of the spec:        // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume        return doneResult();      }      context.method = method;      context.arg = arg;      while (true) {        var delegate = context.delegate;        if (delegate) {          var delegateResult = maybeInvokeDelegate(delegate, context);          if (delegateResult) {            if (delegateResult === ContinueSentinel) continue;            return delegateResult;          }        }        if (context.method === "next") {          // Setting context._sent for legacy support of Babel's          // function.sent implementation.          context.sent = context._sent = context.arg;        } else if (context.method === "throw") {          if (state === GenStateSuspendedStart) {            state = GenStateCompleted;            throw context.arg;          }          context.dispatchException(context.arg);        } else if (context.method === "return") {          context.abrupt("return", context.arg);        }        state = GenStateExecuting;        var record = tryCatch(innerFn, self, context);        if (record.type === "normal") {          // If an exception is thrown from innerFn, we leave state ===          // GenStateExecuting and loop back for another invocation.          state = context.done            ? GenStateCompleted            : GenStateSuspendedYield;          if (record.arg === ContinueSentinel) {            continue;          }          return {            value: record.arg,            done: context.done          };        } else if (record.type === "throw") {          state = GenStateCompleted;          // Dispatch the exception by looping back around to the          // context.dispatchException(context.arg) call above.          context.method = "throw";          context.arg = record.arg;        }      }    };  }  // Call delegate.iterator[context.method](context.arg) and handle the  // result, either by returning a { value, done } result from the  // delegate iterator, or by modifying context.method and context.arg,  // setting context.delegate to null, and returning the ContinueSentinel.  function maybeInvokeDelegate(delegate, context) {    var method = delegate.iterator[context.method];    if (method === undefined) {      // A .throw or .return when the delegate iterator has no .throw      // method always terminates the yield* loop.      context.delegate = null;      if (context.method === "throw") {        // Note: ["return"] must be used for ES3 parsing compatibility.        if (delegate.iterator["return"]) {          // If the delegate iterator has a return method, give it a          // chance to clean up.          context.method = "return";          context.arg = undefined;          maybeInvokeDelegate(delegate, context);          if (context.method === "throw") {            // If maybeInvokeDelegate(context) changed context.method from            // "return" to "throw", let that override the TypeError below.            return ContinueSentinel;          }        }        context.method = "throw";        context.arg = new TypeError(          "The iterator does not provide a 'throw' method");      }      return ContinueSentinel;    }    var record = tryCatch(method, delegate.iterator, context.arg);    if (record.type === "throw") {      context.method = "throw";      context.arg = record.arg;      context.delegate = null;      return ContinueSentinel;    }    var info = record.arg;    if (! info) {      context.method = "throw";      context.arg = new TypeError("iterator result is not an object");      context.delegate = null;      return ContinueSentinel;    }    if (info.done) {      // Assign the result of the finished delegate to the temporary      // variable specified by delegate.resultName (see delegateYield).      context[delegate.resultName] = info.value;      // Resume execution at the desired location (see delegateYield).      context.next = delegate.nextLoc;      // If context.method was "throw" but the delegate handled the      // exception, let the outer generator proceed normally. If      // context.method was "next", forget context.arg since it has been      // "consumed" by the delegate iterator. If context.method was      // "return", allow the original .return call to continue in the      // outer generator.      if (context.method !== "return") {        context.method = "next";        context.arg = undefined;      }    } else {      // Re-yield the result returned by the delegate method.      return info;    }    // The delegate iterator is finished, so forget it and continue with    // the outer generator.    context.delegate = null;    return ContinueSentinel;  }  // Define Generator.prototype.{next,throw,return} in terms of the  // unified ._invoke helper method.  defineIteratorMethods(Gp);  define(Gp, toStringTagSymbol, "Generator");  // A Generator should always return itself as the iterator object when the  // @@iterator function is called on it. Some browsers' implementations of the  // iterator prototype chain incorrectly implement this, causing the Generator  // object to not be returned from this call. This ensures that doesn't happen.  // See https://github.com/facebook/regenerator/issues/274 for more details.  Gp[iteratorSymbol] = function() {    return this;  };  Gp.toString = function() {    return "[object Generator]";  };  function pushTryEntry(locs) {    var entry = { tryLoc: locs[0] };    if (1 in locs) {      entry.catchLoc = locs[1];    }    if (2 in locs) {      entry.finallyLoc = locs[2];      entry.afterLoc = locs[3];    }    this.tryEntries.push(entry);  }  function resetTryEntry(entry) {    var record = entry.completion || {};    record.type = "normal";    delete record.arg;    entry.completion = record;  }  function Context(tryLocsList) {    // The root entry object (effectively a try statement without a catch    // or a finally block) gives us a place to store values thrown from    // locations where there is no enclosing try statement.    this.tryEntries = [{ tryLoc: "root" }];    tryLocsList.forEach(pushTryEntry, this);    this.reset(true);  }  exports.keys = function(object) {    var keys = [];    for (var key in object) {      keys.push(key);    }    keys.reverse();    // Rather than returning an object with a next method, we keep    // things simple and return the next function itself.    return function next() {      while (keys.length) {        var key = keys.pop();        if (key in object) {          next.value = key;          next.done = false;          return next;        }      }      // To avoid creating an additional object, we just hang the .value      // and .done properties off the next function object itself. This      // also ensures that the minifier will not anonymize the function.      next.done = true;      return next;    };  };  function values(iterable) {    if (iterable) {      var iteratorMethod = iterable[iteratorSymbol];      if (iteratorMethod) {        return iteratorMethod.call(iterable);      }      if (typeof iterable.next === "function") {        return iterable;      }      if (!isNaN(iterable.length)) {        var i = -1, next = function next() {          while (++i < iterable.length) {            if (hasOwn.call(iterable, i)) {              next.value = iterable[i];              next.done = false;              return next;            }          }          next.value = undefined;          next.done = true;          return next;        };        return next.next = next;      }    }    // Return an iterator with no values.    return { next: doneResult };  }  exports.values = values;  function doneResult() {    return { value: undefined, done: true };  }  Context.prototype = {    constructor: Context,    reset: function(skipTempReset) {      this.prev = 0;      this.next = 0;      // Resetting context._sent for legacy support of Babel's      // function.sent implementation.      this.sent = this._sent = undefined;      this.done = false;      this.delegate = null;      this.method = "next";      this.arg = undefined;      this.tryEntries.forEach(resetTryEntry);      if (!skipTempReset) {        for (var name in this) {          // Not sure about the optimal order of these conditions:          if (name.charAt(0) === "t" &&              hasOwn.call(this, name) &&              !isNaN(+name.slice(1))) {            this[name] = undefined;          }        }      }    },    stop: function() {      this.done = true;      var rootEntry = this.tryEntries[0];      var rootRecord = rootEntry.completion;      if (rootRecord.type === "throw") {        throw rootRecord.arg;      }      return this.rval;    },    dispatchException: function(exception) {      if (this.done) {        throw exception;      }      var context = this;      function handle(loc, caught) {        record.type = "throw";        record.arg = exception;        context.next = loc;        if (caught) {          // If the dispatched exception was caught by a catch block,          // then let that catch block handle the exception normally.          context.method = "next";          context.arg = undefined;        }        return !! caught;      }      for (var i = this.tryEntries.length - 1; i >= 0; --i) {        var entry = this.tryEntries[i];        var record = entry.completion;        if (entry.tryLoc === "root") {          // Exception thrown outside of any try block that could handle          // it, so set the completion value of the entire function to          // throw the exception.          return handle("end");        }        if (entry.tryLoc <= this.prev) {          var hasCatch = hasOwn.call(entry, "catchLoc");          var hasFinally = hasOwn.call(entry, "finallyLoc");          if (hasCatch && hasFinally) {            if (this.prev < entry.catchLoc) {              return handle(entry.catchLoc, true);            } else if (this.prev < entry.finallyLoc) {              return handle(entry.finallyLoc);            }          } else if (hasCatch) {            if (this.prev < entry.catchLoc) {              return handle(entry.catchLoc, true);            }          } else if (hasFinally) {            if (this.prev < entry.finallyLoc) {              return handle(entry.finallyLoc);            }          } else {            throw new Error("try statement without catch or finally");          }        }      }    },    abrupt: function(type, arg) {      for (var i = this.tryEntries.length - 1; i >= 0; --i) {        var entry = this.tryEntries[i];        if (entry.tryLoc <= this.prev &&            hasOwn.call(entry, "finallyLoc") &&            this.prev < entry.finallyLoc) {          var finallyEntry = entry;          break;        }      }      if (finallyEntry &&          (type === "break" ||           type === "continue") &&          finallyEntry.tryLoc <= arg &&          arg <= finallyEntry.finallyLoc) {        // Ignore the finally entry if control is not jumping to a        // location outside the try/catch block.        finallyEntry = null;      }      var record = finallyEntry ? finallyEntry.completion : {};      record.type = type;      record.arg = arg;      if (finallyEntry) {        this.method = "next";        this.next = finallyEntry.finallyLoc;        return ContinueSentinel;      }      return this.complete(record);    },    complete: function(record, afterLoc) {      if (record.type === "throw") {        throw record.arg;      }      if (record.type === "break" ||          record.type === "continue") {        this.next = record.arg;      } else if (record.type === "return") {        this.rval = this.arg = record.arg;        this.method = "return";        this.next = "end";      } else if (record.type === "normal" && afterLoc) {        this.next = afterLoc;      }      return ContinueSentinel;    },    finish: function(finallyLoc) {      for (var i = this.tryEntries.length - 1; i >= 0; --i) {        var entry = this.tryEntries[i];        if (entry.finallyLoc === finallyLoc) {          this.complete(entry.completion, entry.afterLoc);          resetTryEntry(entry);          return ContinueSentinel;        }      }    },    "catch": function(tryLoc) {      for (var i = this.tryEntries.length - 1; i >= 0; --i) {        var entry = this.tryEntries[i];        if (entry.tryLoc === tryLoc) {          var record = entry.completion;          if (record.type === "throw") {            var thrown = record.arg;            resetTryEntry(entry);          }          return thrown;        }      }      // The context.catch method must only be called with a location      // argument that corresponds to a known catch block.      throw new Error("illegal catch attempt");    },    delegateYield: function(iterable, resultName, nextLoc) {      this.delegate = {        iterator: values(iterable),        resultName: resultName,        nextLoc: nextLoc      };      if (this.method === "next") {        // Deliberately forget the last sent value so that we don't        // accidentally pass it on to the delegate.        this.arg = undefined;      }      return ContinueSentinel;    }  };  // Regardless of whether this script is executing as a CommonJS module  // or not, return the runtime object so that we can declare the variable  // regeneratorRuntime in the outer scope, which allows this module to be  // injected easily by `bin/regenerator --include-runtime script.js`.  return exports;}(  // If this script is executing as a CommonJS module, use module.exports  // as the regeneratorRuntime namespace. Otherwise create a new empty  // object. Either way, the resulting object will be used to initialize  // the regeneratorRuntime variable at the top of this file.  typeof module === "object" ? module.exports : {}));try {  regeneratorRuntime = runtime;} catch (accidentalStrictMode) {  // This module should not be running in strict mode, so the above  // assignment should always work unless something is misconfigured. Just  // in case runtime.js accidentally runs in strict mode, we can escape  // strict mode using a global Function call. This could conceivably fail  // if a Content Security Policy forbids using Function, but in that case  // the proper solution is to fix the accidental strict mode problem. If  // you've misconfigured your bundler to force strict mode and applied a  // CSP to forbid Function, and you're not willing to fix either of those  // problems, please detail your unique predicament in a GitHub issue.  Function("r", "regeneratorRuntime = r")(runtime);}

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