| 123456789101112131415161718192021 | 'use strict';var $TypeError = require('es-errors/type');var IteratorComplete = require('./IteratorComplete');var IteratorNext = require('./IteratorNext');var isIteratorRecord = require('../helpers/records/iterator-record');// https://262.ecma-international.org/15.0/#sec-iteratorstepmodule.exports = function IteratorStep(iteratorRecord) {	if (!isIteratorRecord(iteratorRecord)) {		throw new $TypeError('Assertion failed: `iteratorRecord` must be an Iterator Record'); // step 1	}	var result = IteratorNext(iteratorRecord); // step 1	var done = IteratorComplete(result); // step 2	return done === true ? false : result; // steps 3-4};
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