@Override public synchronized Object put(Object key,Object value){
  int action=containsKey(key) ? defaultAction : PvChangeEvent.PV_ADDED;
  return (put(key,value,action));
}

@ Override public synchronized Object put ( Object key , Object value ) { int action = containsKey ( key ) ? defaultAction : PvChangeEvent . PV_ADDED ; return ( put ( key , value , action ) ) ; }
set attribute of selected key to selected value overridden method to allow notification of process var changes
