Ext.grid.AbstractSelectionModel=function(){this.locked=false;Ext.grid.AbstractSelectionModel.superclass.constructor.call(this)};Ext.extend(Ext.grid.AbstractSelectionModel,Ext.util.Observable,{init:function(a){this.grid=a;this.initEvents()},lock:function(){this.locked=true},unlock:function(){this.locked=false},isLocked:function(){return this.locked}});