'use strict';
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var classof = require('../internals/classof');
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var getMethod = require('../internals/get-method');
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var isNullOrUndefined = require('../internals/is-null-or-undefined');
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var Iterators = require('../internals/iterators');
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var wellKnownSymbol = require('../internals/well-known-symbol');
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var ITERATOR = wellKnownSymbol('iterator');
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module.exports = function (it) {
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if (!isNullOrUndefined(it)) return getMethod(it, ITERATOR)
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|| getMethod(it, '@@iterator')
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|| Iterators[classof(it)];
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};
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