Bug 315281 update copyrights for 3.6
bundles/org.eclipse.core.databinding.observable/src/org/eclipse/core/databinding/observable/set/SetDiff.java
/**
	 * @return the set of added elements
	 */
	public abstract Set getAdditions();
	/**
	 * @return the set of removed elements
	 */
	public abstract Set getRemovals();
	/**
	 * Returns true if the diff has no added or removed elements.
	 * 
	 * @return true if the diff has no added or removed elements.
	 * @since 1.2
	 */
	public boolean isEmpty() {
		return getAdditions().isEmpty() && getRemovals().isEmpty();
	}
	/**
	 * Applies the changes in this diff to the given set
	 * 
	 * @param set
	 *            the set to which the diff will be applied
	 * @since 1.2
	 */
	public void applyTo(Set set) {
		set.addAll(getAdditions());
		set.removeAll(getRemovals());
	}
	/**
	 * Returns a {@link Set} showing what <code>set</code> would look like if