Bug 302791 [CommonNavigator] Associated editor does not close when deleting resource (editorInput) through CommonNavigator
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/actions/CommonActionProviderDescriptor.java
try {
			IEvaluationContext context = NavigatorPlugin.getEvalContext(anElement);
			return (enablement.evaluate(context) == EvaluationResult.TRUE);
		} catch (CoreException e) {
			NavigatorPlugin.log(IStatus.ERROR, 0, e.getMessage(), e);
		}
		return false;
	}
	/**
	 * 
	 * @return An identifier for this ICommonActionProvider. Defaults to
	 *         "org.eclipse.ui.navigator.actionProvider". May not be unique.
	 *         Used to filter the actionProvider using the visibility state
	 *         information.
	 */
	public String getId() {
		return visibilityId;
	}
	/**
	 * 
	 * @return An identifier for this ICommonActionProvider. Defaults to
	 *         'org.eclipse.ui.navigator.actionProvider'. May not be unique.
	 *         Used to determine override or depends on cases.
	 */
	public String getDefinedId() {
		return definedId;
	}
	/**
	 * 
	 * @return True if this is a nested &lt;actionProvider /&gt; element.