Bug 127861 [DataBinding] Mark API provisional
bundles/org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/IUpdatableSet.java
/**
	 * Clears the elements in the reciever 
	 */
	public void clear();
	/**
	 * Adds the given element to the set. Has no effect if the set already contains the element.
	 * 
	 * @param toAdd element to add
	 */
	public void add(Object toAdd);
	/**
	 * Removes the given element from the set. Has no effect if the set does not contain the
	 * element
	 * 
	 * @param toRemove element to remove
	 */
	public void remove(Object toRemove);
	/**
	 * Adds the given elements to the reciever. Elements already contained in the reciever are ignored.
	 * 
	 * @param toAdd elements to add
	 */
	public void addAll(Collection toAdd);
	/**
	 * Removes the given elements from the reciever. Elements not in the reciever are ignored.
	 * 
	 * @param toAdd elements to add
	 */
	public void removeAll(Collection toRemove);
}