Bug 208098 [Markers] All content provider needs a type field
As All shows everything the type column would be very useful for filtering.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerEntry.java
attributeValue);
		collationKeys.put(attribute, key);
		return key;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.provisional.views.markers.MarkerItem#getConcreteRepresentative()
	 */
	public MarkerEntry getConcreteRepresentative() {
		return this;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerItem#getCreationTime()
	 */
	public long getCreationTime() {
		try {
			return marker.getCreationTime();
		} catch (CoreException e) {
			StatusManager.getManager().handle(e.getStatus());
			return -1;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.provisional.views.markers.MarkerItem#getDescription()
	 */