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/views/markers/MarkerItem.java
* 
	 * @return String
	 * @see MarkerViewUtil#PATH_ATTRIBUTE
	 */
	public String getPath() {
		
		return MarkerSupportConstants.EMPTY_STRING;
	}
	/**
	 * Return whether or not this is a concrete node
	 * 
	 * @return boolean
	 */
	public abstract boolean isConcrete();
	/**
	 * Get the human readable name of the type/
	 * @return String
	 */
	public String getMarkerTypeName() {
		return MarkerSupportConstants.EMPTY_STRING;
	}
	/**
	 * Return the number of elements that are children of the receiver
	 * @return int
	 */
	public int getChildrenCount() {
		return 0;
	}
}