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{"ast":null,"code":"/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n!function (global) {\n \"use strict\";\n\n var Op = Object.prototype;\n var hasOwn = Op.hasOwnProperty;\n var undefined; // More compressible than void 0.\n\n var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n var inModule = typeof module === \"object\";\n var runtime = global.regeneratorRuntime;\n\n if (runtime) {\n if (inModule) {\n // If regeneratorRuntime is defined globally and we're in a module,\n // make the exports object identical to regeneratorRuntime.\n module.exports = runtime;\n } // Don't bother evaluating the rest of this file if the runtime was\n // already defined globally.\n\n\n return;\n } // Define the runtime globally (as expected by generated code) as either\n // module.exports (if we're in a module) or a new, empty object.\n\n\n runtime = global.regeneratorRuntime = inModule ? module.exports : {};\n\n function wrap(innerFn, outerFn, self, tryLocsList) {\n // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n var generator = Object.create(protoGenerator.prototype);\n var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,\n // .throw, and .return methods.\n\n generator._invoke = makeInvokeMethod(innerFn, self, context);\n return generator;\n }\n\n runtime.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion\n // record like context.tryEntries[i].completion. This interface could\n // have been (and was previously) designed to take a closure to be\n // invoked without arguments, but in all the cases we care about we\n // already have an existing method we want to call, so there's no need\n // to create a new function object. We can even get away with assuming\n // the method takes exactly one argument, since that happens to be true\n // in every case, so we don't have to touch the arguments object. The\n // only additional allocation required is the completion record, which\n // has a stable shape and so hopefully should be cheap to allocate.\n\n function tryCatch(fn, obj, arg) {\n try {\n return {\n type: \"normal\",\n arg: fn.call(obj, arg)\n };\n } catch (err) {\n return {\n type: \"throw\",\n arg: err\n };\n }\n }\n\n var GenStateSuspendedStart = \"suspendedStart\";\n var GenStateSuspendedYield = \"suspendedYield\";\n var GenStateExecuting = \"executing\";\n var GenStateCompleted = \"completed\"; // Returning this object from the innerFn has the same effect as\n // breaking out of the dispatch switch statement.\n\n var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and\n // .constructor.prototype properties for functions that return Generator\n // objects. For full spec compliance, you may wish to configure your\n // minifier not to mangle the names of these two functions.\n\n function Generator() {}\n\n function GeneratorFunction() {}\n\n function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that\n // don't natively support it.\n\n\n var IteratorPrototype = {};\n\n IteratorPrototype[iteratorSymbol] = function () {\n return this;\n };\n\n var getProto = Object.getPrototypeOf;\n var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n\n if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n // This environment has a native %It
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