mxGraphModel.prototype.setCollapsed=function(a,b){b!=this.isCollapsed(a)&&this.execute(new mxCollapseChange(this,a,b));return b};mxGraphModel.prototype.collapsedStateForCellChanged=function(a,b){var c=this.isCollapsed(a);a.setCollapsed(b);return c};mxGraphModel.prototype.isVisible=function(a){return null!=a?a.isVisible():!1};mxGraphModel.prototype.setVisible=function(a,b){b!=this.isVisible(a)&&this.execute(new mxVisibleChange(this,a,b));return b};