Bug 287103 [CommonNavigator] contentServiceLabelProvider doesn't properly implement overrides
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentDescriptor.java
NavigatorPlugin.logError(0, e.getMessage(), e);
		}
		return false;
	}
	/**
	 * Determine if this content extension could provide the given element as a
	 * child.
	 * 
	 * <p>
	 * This method is used to determine what the parent of an element could be
	 * for Link with Editor support.
	 * </p>
	 * 
	 * @param anElement
	 *            The element that should be used for the evaluation.
	 * @return True if and only if the extension might provide an object of this
	 *         type as a child.
	 */
	public boolean isPossibleChild(Object anElement) {
		if ((enablement == null && possibleChildren == null)
				|| anElement == null) {
			return false;
		} else if(anElement instanceof IStructuredSelection) {
			return arePossibleChildren((IStructuredSelection) anElement);
		}
		try {
			EvaluationContext context = new EvaluationContext(null, anElement);
			context.setAllowPluginActivation(true);
			if (possibleChildren != null) {
				return (possibleChildren.evaluate(context) == EvaluationResult.TRUE);