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/views/markers/MarkerField.java
* @see IMarker#SEVERITY_WARNING
	 * @see IMarker#SEVERITY_INFO
	 */
	public final int getSeverity(MarkerItem element) {
		return element.getAttributeValue(IMarker.SEVERITY, IMarker.SEVERITY_INFO);
	}
	/**
	 * @param item
	 * @return The String value of the object for this particular field to be
	 *         displayed to the user.
	 */
	public abstract String getValue(MarkerItem item);
	/**
	 * Set the configuration element used by the receiver.
	 * 
	 * @param element
	 */
	public final void setConfigurationElement(IConfigurationElement element) {
		configurationElement = element;
	}
	/**
	 * Annotate the image with indicators for whether or not help or quick fix
	 * are available.
	 * 
	 * @param item
	 *            the item being decorated
	 * @param image
	 *            the image being overlaid
	 * @return Image
	 */