public class StartHeadPhoneAction  {

	private final IMixerListener mixerListener = new IMixerListener() {

		public void handleMixerEvent(MixerEvent event) {
			try {
				event.visit(new AbstractMixerDeltaVisitor() {

					private IPlayer headPhone;

					public void beginVisit() {
					       headPhone <=========== COMPLETION of headPhone works fine
						
					}

					public boolean visit(IMixerDelta mixerDelta) {
						hea... <==== NO PROPOSAL for headPhone field !
					}

				});
			} catch (CoreException ex) {

			}
		}

	};