code: public void externalEntityDecl(
          String name,
          String publicId,
          String systemId)
          throws SAXException
      {
          if (m_firstTagNotEmitted)
          {
              flush();
          }
          m_handler.externalEntityDecl(name, publicId, systemId);
      }
docs: Pass the call on to the underlying handler
  @see org.xml.sax.ext.DeclHandler#externalEntityDecl(String, String, String)