Bug 25827 Disposing of MemberFilterActionGroup
Build 2.0.2 and 2.1 When investigating an editor memory leak PR we found out that this group has a dispose method which is never called. When we then called from the editor it throw an exeption (viewer was disposed). Don't know if the group really needs dispose() if so it should get called.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaOutlinePage.java
fReusedExpandedItem= null;
				}
				
				protected boolean mustUpdateParent(IJavaElementDelta delta, IJavaElement element) {
					if (element instanceof IMethod) {
						if ((delta.getKind() & IJavaElementDelta.ADDED) != 0) {
							try {
								return ((IMethod)element).isMainMethod();
							} catch (JavaModelException e) {
								JavaPlugin.log(e.getStatus());
							}
						}
						return "main".equals(element.getElementName()); 
					}
					return false;
				}
				
				protected ISourceRange getSourceRange(IJavaElement element) throws JavaModelException {
					if (element instanceof IMember && !(element instanceof IInitializer))
						return ((IMember) element).getNameRange();
					if (element instanceof ISourceReference)
						return ((ISourceReference) element).getSourceRange();
					return null;
				}
				
				protected boolean overlaps(ISourceRange range, int start, int end) {
					return start <= (range.getOffset() + range.getLength() - 1) && range.getOffset() <= end;
				}
				
				protected boolean filtered(IJavaElement parent, IJavaElement child) {