m_problemListener = new ProblemListenerDefault((DefaultErrorHandler)m_tfactory.getErrorListener(), l);
m_problemListener = new ProblemListenerDefault(l); if (m_transformerImpl != null) m_transformerImpl.setErrorListener(m_problemListener); m_tfactory.setErrorListener(m_problemListener);
  public void setProblemListener(ProblemListener l)  {    if (l instanceof ProblemListenerDefault)      m_problemListener = (ProblemListenerDefault)l;    else      m_problemListener = new ProblemListenerDefault((DefaultErrorHandler)m_tfactory.getErrorListener(), l);          }