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/internal/views/markers/MarkerSupportItem.java
return super.getAttributeValue(attribute, defaultValue);
	}
	/**
	 * Get the children of the node.
	 * 
	 * @return MarkerNode[]
	 */
	abstract MarkerSupportItem[] getChildren();
	/**
	 * Return the number of elements that are children of the receiver
	 * @return int
	 */
	int getChildrenCount() {
		return 0;
	}
	/**
	 * Return the creation time for the receiver.
	 * @return long
	 */
	long getCreationTime() {
		return -1;
	}
	/**
	 * Return the description of the receiver.
	 * 
	 * @return String
	 */
	abstract String getDescription();
	/**
	 * Return the ID of the receiver