docs: function (messageData) {
  		if (status.enabled) {
  			var messageObject = JSON.parse(messageData);
  			if ((messageObject || {})
  				.id) {
  				switch (messageObject.action) {
  				case MESSENGER_CONST.ACTION.ECHIP_SET:
  					onSetRequestCallback(messageObject.data, function () {
  						setRequestResponse(messageObject.id);
  					});
  					break;
  				case MESSENGER_CONST.ACTION.ECHIP_GET:
  					onGetRequestCallback(messageObject.data, function (data) {
  						getRequestResponse(messageObject.id, data);
  					});
  					break;
  				}
  			}
  		}
  	}