Bug 89137 [JFace] - API Review - "temporary" API in AbstractTreeViewer
AbstractTreeViewer contains two methods documented as "temporary" internalRefresh(Widget, Object) internalAdd(Widget, Object, Object [])
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
}
	/**
	 * Hook for testing.
	 * @param element
	 * @return Widget
	 */
	public Widget testFindItem(Object element) {
		return findItem(element);
	}
	/**
	 * Removes all elements from the map.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method.
	 * </p>
	 */
	protected void unmapAllElements() {
		if (elementMap != null) {
			elementMap = newHashtable(CustomHashtable.DEFAULT_CAPACITY);
		}
	}
	/**
	 * Removes the given element from the internal element to widget map. Does
	 * nothing if mapping is disabled. If mapping is enabled, the given element
	 * must be present.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method.
	 * </p>
	 *