Bug 105648 [Undo] - ObjectUndoContext should match if objects are equal
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/ObjectUndoContext.java
*            the object to be represented.
	 */
	public ObjectUndoContext(Object object) {
		this(object, null);
	}
	/**
	 * Construct an operation context that represents the given object and has a
	 * specialized label.
	 * 
	 * @param object 
	 *            the object to be represented.
	 * @param label 
	 *            the label for the context
	 */
	public ObjectUndoContext(Object object, String label) {
		super();
		this.object = object;
		this.label = label;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IUndoContext#getLabel()
	 */
	public String getLabel() {
		if (label == null && object != null) {
			return object.toString();
		}
		return label;
	}