  });
                     this._container = containerObj.container;
                     return this._container;
                 }


             });

             L.easyButton = function(/* args will pass automatically */){
                 var args = Array.prototype.concat.apply([L.Control.EasyButton],arguments);
                 return new (Function.prototype.bind.apply(L.Control.EasyButton, args));
             };

             /*************************
              *
              * util functions
