removes a listener from this manager . concode_field_sep Object[] EMPTY_ARRAY concode_elem_sep ListenerList listenerList concode_field_sep Object[] getListeners concode_elem_sep void addListenerObject concode_elem_sep boolean isListenerAttached concode_elem_sep void clearListeners
void function ( final Object arg0 ) { if ( listenerList != null ) { listenerList . remove ( arg0 ) ; if ( listenerList . isEmpty ( ) ) { listenerList = null ; } } }