@Override
  @SuppressWarnings("UseOfSystemOutOrSystemErr")
  public void trace(@Nullable Throwable t) {
    if (t != null && isTraceEnabled()) {
      System.out.print("TRACE[" + myCategory + "]: ");
      t.printStackTrace(System.out);
    }
  }
@Override
  @SuppressWarnings("UseOfSystemOutOrSystemErr")
  public void trace(@Nullable Throwable t)