Stylesheet popStylesheet(){
  if (!m_stylesheetLocatorStack.isEmpty())   m_stylesheetLocatorStack.pop();
  if (!m_stylesheets.isEmpty())   m_lastPoppedStylesheet=(Stylesheet)m_stylesheets.pop();
  return m_lastPoppedStylesheet;
}

Stylesheet popStylesheet ( ) { if ( ! m_stylesheetLocatorStack . isEmpty ( ) ) m_stylesheetLocatorStack . pop ( ) ; if ( ! m_stylesheets . isEmpty ( ) ) m_lastPoppedStylesheet = ( Stylesheet ) m_stylesheets . pop ( ) ; return m_lastPoppedStylesheet ; }
pop the last stylesheet pushed , and return the stylesheet that this handler is constructing , and set the last popped stylesheet member . also pop the stylesheet locator stack .
