equals(g) {
    if (!g || !(g instanceof Graph)) {
      return false;
    }
    return this._lastUpdate === g._lastUpdate;
  }
/**
   * Check the equality of two graphs data by checking last update time stamp
   * @param  {Object} g Another graph to be compared against itself
   * @return {Bool}   True if the graph is the same as itself.
   */
Check the equality of two graphs data by checking last update time stamp
@param  {Object} g Another graph to be compared against itself
@return {Bool}   True if the graph is the same as itself.
Check the equality of two graphs data by checking last update time stamp @param { Object } g Another graph to be compared against itself @return { Bool } True if the graph is the same as itself .
equals(g) {
    if (!g || !(g instanceof Graph)) {
      return false;
    }
    return this._lastUpdate === g._lastUpdate;
  }
equals ( g ) { if ( ! g || ! ( g instanceof Graph ) ) { return false ; } return this . _lastUpdate === g . _lastUpdate ; }
Check the equality of two graphs data by checking last update time stamp
 @param  {Object} g Another graph to be compared against itself
 @return {Bool}   True if the graph is the same as itself.
Check the equality of two graphs data by checking last update time stamp @param { Object } g Another graph to be compared against itself @return { Bool } True if the graph is the same as itself .