mxGraph.prototype.setCellsDisconnectable=function(a){this.cellsDisconnectable=a};mxGraph.prototype.isValidSource=function(a){return null==a&&this.allowDanglingEdges||null!=a&&(!this.model.isEdge(a)||this.connectableEdges)&&this.isCellConnectable(a)};mxGraph.prototype.isValidTarget=function(a){return this.isValidSource(a)};mxGraph.prototype.isValidConnection=function(a,b){return this.isValidSource(a)&&this.isValidTarget(b)};mxGraph.prototype.setConnectable=function(a){this.connectionHandler.setEnabled(a)};