public void addCapabilitiesFilterListener(CapabilitiesFilterChangeListener l){
  m_CapabilitiesFilterChangeListeners.add(l);
}

public void addCapabilitiesFilterListener ( CapabilitiesFilterChangeListener l ) { m_CapabilitiesFilterChangeListeners . add ( l ) ; }
adds the listener to the list of objects that listen for changes of the capabilitiesfilter
