Bug 221337 [Markers] MarkerItem has too much API
We are exposing too much as API in MarkerItem. We should only provide getAtttributeValue and the methods that support PATH_ATTRIBUTE and NAME_ATTRIBUTE as they are tricky. Everything else needs to be pushed down to an internal class. We should mention the relevant IMarker constants for those removed.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerEntry.java
* (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerItem#getCreationTime()
	 */
	public long getCreationTime() {
		try {
			return marker.getCreationTime();
		} catch (CoreException e) {
			Policy.handle(e);
			return -1;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.provisional.views.markers.MarkerItem#getDescription()
	 */
	public String getDescription() {
		return getAttributeValue(IMarker.MESSAGE,
				MarkerSupportConstants.EMPTY_STRING);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerItem#getID()
	 */
	public long getID() {
		return marker.getId();
	}
	/*