Bug 81196 Can't search for References, ... to an ITypeParameter [search]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/FindReferencesInWorkingSetAction.java
*/
	public FindReferencesInWorkingSetAction(IWorkbenchSite site, IWorkingSet[] workingSets) {
		this(site);
		fWorkingSets= workingSets;
	}
	/**
	 * Note: This constructor is for internal use only. Clients should not call this constructor.
	 */
	public FindReferencesInWorkingSetAction(JavaEditor editor) {
		super(editor);
		init();
		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.FIND_REFERENCES_IN_WORKING_SET_ACTION);
	}
	/**
	 * Note: This constructor is for internal use only. Clients should not call this constructor.
	 */
	public FindReferencesInWorkingSetAction(JavaEditor editor, IWorkingSet[] workingSets) {
		this(editor);
		fWorkingSets= workingSets;
	}
	private void init() {
		setText(SearchMessages.getString("Search.FindReferencesInWorkingSetAction.label")); 
		setToolTipText(SearchMessages.getString("Search.FindReferencesInWorkingSetAction.tooltip")); 
	}
	FindReferencesInWorkingSetAction(IWorkbenchSite site, String label, Class[] validTypes) {
		super(site, label, validTypes);
		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.FIND_REFERENCES_IN_WORKING_SET_ACTION);
	}
	FindReferencesInWorkingSetAction(JavaEditor editor, String label, Class[] validTypes) {
		super(editor, label, validTypes);