Bug 124569 [projection] expose projection model updater on JavaEditor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
menu.insertAfter(IContextMenuConstants.GROUP_OPEN, new GroupMarker(IContextMenuConstants.GROUP_SHOW));
		ActionContext context= new ActionContext(getSelectionProvider().getSelection());
		fContextMenuGroup.setContext(context);
		fContextMenuGroup.fillContextMenu(menu);
		fContextMenuGroup.setContext(null);
	}
	/**
	 * Creates the outline page used with this editor.
	 *
	 * @return the created Java outline page
	 */
	protected JavaOutlinePage createOutlinePage() {
		JavaOutlinePage page= new JavaOutlinePage(fOutlinerContextMenuId, this);
		fOutlineSelectionChangedListener.install(page);
		setOutlinePageInput(page, getEditorInput());
		return page;
	}
	/**
	 * Informs the editor that its outliner has been closed.
	 */
	public void outlinePageClosed() {
		if (fOutlinePage != null) {
			fOutlineSelectionChangedListener.uninstall(fOutlinePage);
			fOutlinePage= null;
			resetHighlightRange();
		}
	}
	/**
	 * Synchronizes the outliner selection with the given element
	 * position in the editor.