mxGraphSelectionModel.prototype.addCells=function(a){if(null!=a){var b=null;this.singleSelection&&(b=this.cells,a=[this.getFirstSelectableCell(a)]);for(var c=[],d=0;d<a.length;d++)!this.isSelected(a[d])&&this.graph.isCellSelectable(a[d])&&c.push(a[d]);this.changeSelection(c,b)}};mxGraphSelectionModel.prototype.removeCell=function(a){null!=a&&this.removeCells([a])};