protected void doCall() throws java.lang.Throwable {
   receiver$.isAPath(arg1, arg2);
 }
 protected void doCall() throws java.lang.Throwable {
   receiver$.toString();
 }
 protected void doCall() throws java.lang.Throwable {
   receiver$.isNode(arg1);
 }
 protected void doCall() throws java.lang.Throwable {
   receiver$.removeArc(arg1, arg2);
 }
 protected void doCall() throws java.lang.Throwable {
   receiver$.transpose();
 }
 protected void doCall() throws java.lang.Throwable {
   receiver$.DFSVisit(u);
 }
 protected void doCall() throws java.lang.Throwable {
   receiver$.unconnected(arg1);
 }