Bug 167323 [Viewers]Open AbstractTreeViewer for external widget implementors
As reported by Ross Camara AbstractTreeViewer would work for nebula if we would open the API a bit. Boris and I decided that we will do this in 2 steps: 1. open the API 2. moving the Virtual-Support bits from TreeViewer to AbstractTreeViewer when the nebula grid provides virtual support.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
});
	}
	/**
	 * Removes the given element from the viewer. The selection is updated if
	 * necessary.
	 * <p>
	 * This method should be called (by the content provider) when a single
	 * element has been removed from the model, in order to cause the viewer to
	 * accurately reflect the model. This method only affects the viewer, not
	 * the model. Note that there is another method for efficiently processing
	 * the simultaneous removal of multiple elements.
	 * </p>
	 * 
	 * @param elementsOrTreePaths
	 *            the element
	 */
	public void remove(Object elementsOrTreePaths) {
		remove(new Object[] { elementsOrTreePaths });
	}
	/**
	 * Removes all items from the given control.
	 * 
	 * @param control
	 *            the control
	 */
	protected abstract void removeAll(Control control);
	/**
	 * Removes a listener for expand and collapse events in this viewer. Has no
	 * affect if an identical listener is not registered.
	 *