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var toArray = require('./toArray');
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/**
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 * Gets the next value on a wrapped object following the
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 * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
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 *
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 * @name next
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 * @memberOf _
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 * @since 4.0.0
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 * @category Seq
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 * @returns {Object} Returns the next iterator value.
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 * @example
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 *
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 * var wrapped = _([1, 2]);
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 *
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 * wrapped.next();
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 * // => { 'done': false, 'value': 1 }
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 *
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 * wrapped.next();
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 * // => { 'done': false, 'value': 2 }
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 *
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 * wrapped.next();
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 * // => { 'done': true, 'value': undefined }
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 */
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function wrapperNext() {
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  if (this.__values__ === undefined) {
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    this.__values__ = toArray(this.value());
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  }
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  var done = this.__index__ >= this.__values__.length,
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      value = done ? undefined : this.__values__[this.__index__++];
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  return { 'done': done, 'value': value };
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}
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module.exports = wrapperNext;