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
list.add(element);
			}
			fViewer.setSelection(new StructuredSelection(list));
		}
	}
	protected void restoreExpansionState(IMemento memento) {
		IMemento childMem= memento.getChild(TAG_EXPANDED);
		if (childMem != null) {
			ArrayList elements= new ArrayList();
			IMemento[] elementMem= childMem.getChildren(TAG_ELEMENT);
			for (int i= 0; i < elementMem.length; i++) {
				Object element= JavaCore.create(elementMem[i].getString(TAG_PATH));
				if (element != null)
					elements.add(element);
			}
			fViewer.setExpandedElements(elements.toArray());
		}
	}
	
	/**
	 * Create the KeyListener for doing the refresh on the viewer.
	 */
	private void initKeyListener() {
		fViewer.getControl().addKeyListener(new KeyAdapter() {
			public void keyReleased(KeyEvent event) {
				fActionSet.handleKeyEvent(event);
			}
		});
	}
	/**