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- var call = require('../internals/function-call');
- var AsyncFromSyncIterator = require('../internals/async-from-sync-iterator');
- var anObject = require('../internals/an-object');
- var getIterator = require('../internals/get-iterator');
- var getMethod = require('../internals/get-method');
- var wellKnownSymbol = require('../internals/well-known-symbol');
- var ASYNC_ITERATOR = wellKnownSymbol('asyncIterator');
- module.exports = function (it, usingIterator) {
- var method = arguments.length < 2 ? getMethod(it, ASYNC_ITERATOR) : usingIterator;
- return method ? anObject(call(method, it)) : new AsyncFromSyncIterator(getIterator(it));
- };
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