Bug 29170 False error feedback from "Show in package explorer"
Build 20030107 1. Open a .java file in the Java editor. 2. Click "Collapse All" in the packages view to collapse the tree. 3. Right click on the top-level type in the Outline view and choose "Show in Package Explorer" 4. The packages view correctly expands to the selected type, but an error dialog pops up: Title: "Show in Package Explorer" Message: "Couldn't reveal the selected element in Package Explorer. May be the element is filtered out." This happens any time the tree needs to be expanded to reveal a type.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
public void selectAndReveal(Object element) {
		selectReveal(new StructuredSelection(element));
	}
	
	/**
	 * Returns whether the preference to link selection to active editor is enabled.
	 */
	boolean isLinkingEnabled() {
		return PreferenceConstants.getPreferenceStore().getBoolean(PreferenceConstants.LINK_PACKAGES_TO_EDITOR);
	}
	/**
	 * Links to editor (if option enabled)
	 */
	private void linkToEditor(IStructuredSelection selection) {
		
		
		if (!isActivePart())
			return;
		Object obj= selection.getFirstElement();
		if (selection.size() == 1) {
			IEditorPart part= EditorUtility.isOpenInEditor(obj);
			if (part != null) {
				IWorkbenchPage page= getSite().getPage();
				page.bringToTop(part);
				if (obj instanceof IJavaElement) 
					EditorUtility.revealInEditor(part, (IJavaElement) obj);
			}
		}
	}
	private boolean isActivePart() {