Bug 44393 [Viewers] + shown in front of methods even if local types filter is on (different behaviour in outliner, members view and package explorer)
Test pass M4 - load JUnit - add an anonymous type to Assert#Assert - enable local type filter in Outliner observe: there is a plus in front of Assert which goes away when clicking on it. This might be JFace related but I would prefer that the plus is removed when the filter is switched on. - close Outliner - open Outliner observe: there isn't any plus sign in front of Assert - open Java Browsing perspective - enable local type filter in members view - select Assert class in Types view observe: the constructor Assert has a plus sign in front which goes away when clicking on it. - switch to another class - switch back to Assert observe: the constructor again has a plus sign in front. This is really annoying. The members view should at least behave like the outliner. - switch to package explorer - expand Assert - toggle local type filter observe: plus sign is added and removed correctly.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
*/
	public void expandAll() {
		expandToLevel(ALL_LEVELS);
	}
	/**
	 * Expands the root of the viewer's tree to the given level.
	 * 
	 * @param level
	 *           non-negative level, or <code>ALL_LEVELS</code> to expand all
	 *           levels of the tree
	 */
	public void expandToLevel(int level) {
		expandToLevel(getRoot(), level);
	}
	/**
	 * Expands all ancestors of the given element so that the given element
	 * becomes visible in this viewer's tree control, and then expands the
	 * subtree rooted at the given element to the given level.
	 * 
	 * @param element
	 *           the element
	 * @param level
	 *           non-negative level, or <code>ALL_LEVELS</code> to expand all
	 *           levels of the tree
	 */
	public void expandToLevel(Object element, int level) {
		Widget w = internalExpand(element, true);
		if (w != null)
			internalExpandToLevel(w, level);
	}