code: function(messageName, handler) {
  		var agora = (this.env ||  this).data.agora,
  			self = this;
  		var suphandler = function() {
  			handler.apply(self, arguments);
  		};
  		agora.on(messageName, suphandler);
  		(this.binds = this.binds ||  []).push(function() {
  			agora.off(messageName, suphandler);
  		});
  		return this;
  	}
docs: ______________________ AGORA MANAGEMENT