code: public Source getAssociatedStylesheet()
    {
  
      int sz = m_stylesheets.size();
  
      if (sz > 0)
      {
        Source source = (Source) m_stylesheets.elementAt(sz-1);
        return source;      
      }
      else
        return null;
    }
docs: Return the last stylesheet found that match the constraints.
  
  @return Source object that references the last stylesheet reference
  that matches the constraints.