Bug 80473 [rulers][preferences] allow disabling of range indicator on left of java editor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
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.
	 *
	 * @param element the java element to select
	 */
	protected void synchronizeOutlinePage(ISourceReference element) {
		synchronizeOutlinePage(element, true);
	}
	/**
	 * Synchronizes the outliner selection with the given element
	 * position in the editor.
	 *
	 * @param element the java element to select
	 * @param checkIfOutlinePageActive <code>true</code> if check for active outline page needs to be done