| 12345678910111213141516 | var classof = require('../internals/classof');var hasOwn = require('../internals/has-own-property');var isNullOrUndefined = require('../internals/is-null-or-undefined');var wellKnownSymbol = require('../internals/well-known-symbol');var Iterators = require('../internals/iterators');var ITERATOR = wellKnownSymbol('iterator');var $Object = Object;module.exports = function (it) {  if (isNullOrUndefined(it)) return false;  var O = $Object(it);  return O[ITERATOR] !== undefined    || '@@iterator' in O    || hasOwn(Iterators, classof(O));};
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