Bug 44443 [Tasks] Problems View should 'filter' more efficiently
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerFilter.java
return rootTypes;
	}
	/**
	 * @return the selected marker types to be displayed.
	 */
	List getSelectedTypes() {
		return selectedTypes;
	}
	/**
	 * @return the current working set or <code>null</code> if no working set is defined.
	 */
	IWorkingSet getWorkingSet() {
		return workingSet;
	}
	/**
	 * Sets the enablement state of the filter.
	 */
	void setEnabled(boolean enabled) {
		this.enabled = enabled;
	}
	/**
	 * Sets the enablement state of filtering by marker limit.
	 */
	void setFilterOnMarkerLimit(boolean filterOnMarkerLimit) {
		this.filterOnMarkerLimit = filterOnMarkerLimit;
	}
	/**
	 * Sets the selected marker types to be displayed. The List <b>MUST ONLY</b> contain 
	 * <code>MarkerType</code> objects.
	 */