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