Bug 55604 [implementation] JavaOutlinePage should dispose CustomFiltersActionGroup
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
}	
	
	/*
	 * @see ISelectionProvider#addSelectionChangedListener(ISelectionChangedListener)
	 */
	public void addSelectionChangedListener(ISelectionChangedListener listener) {
		if (fOutlineViewer != null)
			fOutlineViewer.addSelectionChangedListener(listener);
		else
			fSelectionChangedListeners.add(listener);
	}
	
	/*
	 * @see ISelectionProvider#removeSelectionChangedListener(ISelectionChangedListener)
	 */
	public void removeSelectionChangedListener(ISelectionChangedListener listener) {
		if (fOutlineViewer != null)
			fOutlineViewer.removeSelectionChangedListener(listener);
		else
			fSelectionChangedListeners.remove(listener);
	}
	
	/*
	 * @see ISelectionProvider#setSelection(ISelection)
	 */
	public void setSelection(ISelection selection) {
		if (fOutlineViewer != null)
			fOutlineViewer.setSelection(selection);		
	}