public void addAllowed(Class<?> c,String displayName){
  HashSet<String> list;
  list=m_Allowed.get(c);
  if (list == null) {
    list=new HashSet<String>();
    m_Allowed.put(c,list);
  }
  list.add(displayName);
}

public void addAllowed ( Class < ? > c , String displayName ) { HashSet < String > list ; list = m_Allowed . get ( c ) ; if ( list == null ) { list = new HashSet < String > ( ) ; m_Allowed . put ( c , list ) ; } list . add ( displayName ) ; }
adds the given property ( display name ) to the list of allowed properties for the specified class .
