JavaUIHelp.setHelp(this, IJavaHelpContextIds.CALL_HIERARCHY_VIEW);
    LocationViewer(Composite parent) {        super(createTable(parent));        setContentProvider(new ArrayContentProvider());        setLabelProvider(new LocationLabelProvider());        setInput(new ArrayList());        createColumns();                JavaUIHelp.setHelp(this, IJavaHelpContextIds.CALL_HIERARCHY_VIEW);    }