@Override
  public int compareTo(BreakpointItem breakpointItem) {
    if (breakpointItem.getBreakpoint() instanceof XBreakpointBase) {
      return ((XBreakpointBase)myBreakpoint).compareTo((XBreakpoint)breakpointItem.getBreakpoint());
    }
    else {
      return 0;
    }
  }
@Override
  public int compareTo(BreakpointItem breakpointItem)