@Override
  public synchronized Breakpoint getBreakpoint(String uri, int lineNumber) {
    final Map<String, Breakpoint> s = myBreakpoints.get(lineNumber);
    if (s != null) {
      return s.get(normalizeUri(uri));
    }
    return null;
  }
@Override
  public synchronized Breakpoint getBreakpoint(String uri, int lineNumber)