Bug 275910 [Widgets] PaintListener on Tree not invoked when item count is 0
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
return generator != null ? generator.equals(generator) : false;
	}
	/**
	 * @return Returns the generator.
	 */
	MarkerContentGenerator getGenerator() {
		return generator;
	}
	/**
	 * Log that a generator id is invalid.
	 * 
	 * @param id
	 */
	void logInvalidGenerator(String id) {
		StatusManager.getManager().handle(
				new Status(IStatus.WARNING, IDEWorkbenchPlugin.IDE_WORKBENCH,
						NLS.bind("Invalid markerContentGenerator {0} ", 
								id)));
	}
	/**
	 * Open the filters dialog for the receiver.
	 */
	void openFiltersDialog() {
		FiltersConfigurationDialog dialog = new FiltersConfigurationDialog(
				getSite().getWorkbenchWindow().getShell(), generator);
		if (dialog.open() == Window.OK) {
			generator.updateFilters(dialog.getFilters(), dialog.andFilters());
		}
	}
	/**