protected CopySourceReferencesToClipboardAction(IWorkbenchSite site, Clipboard clipboard) {
protected CopySourceReferencesToClipboardAction(IWorkbenchSite site, Clipboard clipboard, SelectionDispatchAction pasteAction) {
	protected CopySourceReferencesToClipboardAction(IWorkbenchSite site, Clipboard clipboard) {		super(site);		Assert.isNotNull(clipboard);		fClipboard= clipboard;	}