Bug 264818 [Markers] Problems view: Status line shows wrong selection count summary
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
* Return whether or not group is enabled.
	 * 
	 * @param group
	 * @return boolean
	 */
	boolean isEnabled(MarkerFieldFilterGroup group) {
		return builder.getEnabledFilters().contains(group);
	}
	/**
	 * Return the main sort field for the receiver.
	 * 
	 * @return {@link MarkerField}
	 */
	boolean isPrimarySortField(MarkerField field) {
		return builder.getPrimarySortField().equals(field);
	}
	/**
	 * Return whether or not generator is the selected one.
	 * 
	 * @param generator
	 * @return boolean
	 */
	boolean isShowing(MarkerContentGenerator generator) {
		return this.builder.getGenerator().equals(generator);
	}
	/**
	 * Log that a generator id is invalid.
	 * 
	 * @param id
	 */