if (m_problemListener != null) m_transformerImpl.setErrorListener(m_problemListener);
  public void setStylesheet(StylesheetRoot stylesheetRoot)  {    m_stylesheetRoot = stylesheetRoot;    org.apache.xalan.templates.StylesheetRoot sr = stylesheetRoot.getObject();    if (m_transformerImpl == null)      m_transformerImpl = (TransformerImpl)sr.newTransformer();    m_transformerImpl.setStylesheet(sr);  }