mxGraph.prototype.getCurrentRoot=function(){return this.view.currentRoot};mxGraph.prototype.getTranslateForRoot=function(a){return null};mxGraph.prototype.isPort=function(a){return!1};mxGraph.prototype.getTerminalForPort=function(a,b){return this.model.getParent(a)};mxGraph.prototype.getChildOffsetForCell=function(a){return null};mxGraph.prototype.enterGroup=function(a){a=a||this.getSelectionCell();null!=a&&this.isValidRoot(a)&&(this.view.setCurrentRoot(a),this.clearSelection())};