code: function AccumulativeHandler(target) {
  	target = target || null;
  
  	Handler.call(this);
  
  	this._target = target;
  	this._prevRecord = null;
  }
docs: ------------------------------------------------------------------------------ Accumulator ------------------------------------------------------------------------------ 
  Accumulates equal records and transmits them when is necessary.
  
  @constructor AccumulativeHandler
  @extends Handler
  @param {Handler} [target]