text: /** ----------------------------------------
      Update Value
   ---------------------------------------- */
  
  /**
   * Will update a single item key within the
   * current data set to a given value.
   *
   * @params { number } index - index of item
   * @params { string } key - target key
   * @params { any } value - new value for key
   */
  
  function updateValue(index, key, value) {
      this._hasTrail();
      this._data[index][key] = value;
      this._chain(this._data);
  }
  
  /** ----------------------------------------
      Exports
   ---------------------------------------- */
  
  export default updateValue;