Bug 275929 [CommonNavigator] IPipelinedTreeContentProvider.getPipelinedElements() not ever called
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentServiceContentProvider.java
.getParent(anElement);
						if ((parent = findParent(foundExtension, anElement,
								parent)) != null)
							parents.add(parent);
					}
				}
			} catch (RuntimeException re) {
				NavigatorPlugin
						.logError(
								0,
								NLS
										.bind(
												CommonNavigatorMessages.Could_not_provide_children_for_element,
												new Object[] { foundExtension
														.getDescriptor()
														.getId() }), re);
			} catch (Error e) {
				NavigatorPlugin
						.logError(
								0,
								NLS
										.bind(
												CommonNavigatorMessages.Could_not_provide_children_for_element,
												new Object[] { foundExtension
														.getDescriptor()
														.getId() }), e);
		
			} 
		}