Bug 264818 [Markers] Problems view: Status line shows wrong selection count summary
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/CachedMarkerBuilder.java
* 
	 * @param and
	 */
	void setAndFilters(boolean and) {
		andFilters = and;
	}
	/**
	 * Set the category group.
	 * 
	 * @param group
	 *            {@link MarkerGroup} or <code>null</code>.
	 */
	void setCategoryGroup(MarkerGroup group) {
		this.categoryGroup = group;
		if (group == null)
			getComparator().setCategory(null);
		else
			getComparator().setCategory(group.getMarkerField());
		scheduleMarkerUpdate();
	}
	/**
	 * Categorise by the default setting for contentGenerator.
	 * 
	 * @param contentGenerator
	 */
	private void setDefaultCategoryGroup(MarkerContentGenerator contentGenerator) {
		String categoryName = contentGenerator.getCategoryName();
		if (categoryName != null) {
			MarkerGroup group = contentGenerator.getMarkerGroup(categoryName);
			if (group != null)