Bug 261147 [CommonNavigator] Navigator label provider uses inconsistent methods to do the same thing
In NavigatorContentServiceLabelProvider some of the methods use findContentExtensionsWithPossibleChild and others use findRelevantLabelProvider. The latter is better and they should all use that one.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentServiceLabelProvider.java
implements ILabelProvider, IColorProvider, IFontProvider, ITreePathLabelProvider, ILabelProviderListener, IStyledLabelProvider {
 
	private final NavigatorContentService contentService;
	private final boolean isContentServiceSelfManaged;
	private final ReusableViewerLabel reusableLabel = new ReusableViewerLabel();
  
	/**
	 * <p>
	 * Uses the supplied content service to acquire the available extensions.