throw new Error("not implemented");
int n = 0; for (int i = 0; i < solids.size(); i++) if (((Segment) solids.elementAt(i)).contains(x, y)) n++;  for (int i = 0; i < holes.size(); i++) if (((Segment) holes.elementAt(i)).contains(x, y)) n--;  return (n != 0);
  public boolean contains(double x, double y)  {    // XXX Implement.    throw new Error("not implemented");  }