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rOACCT/node_modules/core-js/modules/esnext.iterator.from.js
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esnext.iterator.from.js
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			var $ = require('../internals/export');
			var call = require('../internals/function-call');
			var toObject = require('../internals/to-object');
			var isPrototypeOf = require('../internals/object-is-prototype-of');
			var IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;
			var createIteratorProxy = require('../internals/iterator-create-proxy');
			var getIteratorFlattenable = require('../internals/get-iterator-flattenable');

			var IteratorProxy = createIteratorProxy(function () {
			return call(this.next, this.iterator);
			}, true);

			// `Iterator.from` method
			// https://github.com/tc39/proposal-iterator-helpers
			$({ target: 'Iterator', stat: true }, {
			from: function from(O) {
			var iteratorRecord = getIteratorFlattenable(typeof O == 'string' ? toObject(O) : O);
			return isPrototypeOf(IteratorPrototype, iteratorRecord.iterator)
			? iteratorRecord.iterator
			: new IteratorProxy(iteratorRecord);
			}
			});