Bug 221521 [Markers] New markers API needs to be pared down
We have too much API in some of the new classes and they can be moved to internals
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerFieldFilterGroup.java
private static final String ATTRIBUTE_ON_ANY_IN_SAME_CONTAINER = "ON_ANY_IN_SAME_CONTAINER";
	private static final String ATTRIBUTE_ON_SELECTED_AND_CHILDREN = "ON_SELECTED_AND_CHILDREN";
	private static final String ATTRIBUTE_ON_SELECTED_ONLY = "ON_SELECTED_ONLY"; 
	/**
	 * The attribute values for the scope
	 * 
	 */
	private static final String ATTRIBUTE_SCOPE = "scope"; 
	private static final String ATTRIBUTE_VALUES = "values"; 
	private static final IProject[] EMPTY_PROJECT_ARRAY = new IProject[0];