Bug 294303 [Markers] 'Queuing Viewer Updates' in Problems view
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerCategory.java
boolean refreshing;
	
	int start;
	int end;
	MarkerEntry[] children;
	private String name;
	private int severity = -1;
	private Markers markers;
	/**
	 * Create a new instance of the receiver that has the markers between
	 * startIndex and endIndex showing.
	 * 
	 * @param markers
	 * @param startIndex
	 * @param endIndex
	 *            the builder used to generate the children lazily.
	 */
	MarkerCategory(Markers markers, int startIndex,
			int endIndex, String categoryName) {
		this.markers = markers;