Bug 182714 [Contributions] Improve toolbar configurability
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ContributionManager.java
if (item.isDirty()) {
					return true;
				}
			}
		}
		return false;
	}
	/*
	 * (non-Javadoc) Method declared on IContributionManager.
	 */
	public boolean isEmpty() {
		return contributions.isEmpty();
	}
	/**
	 * The given item was added to the list of contributions. Marks the manager
	 * as dirty and updates the number of dynamic items, and the memento.
	 * 
	 * @param item
	 *            the item to be added
	 * 
	 */
	protected void itemAdded(IContributionItem item) {
		item.setParent(this);
		markDirty();
		if (item.isDynamic()) {
			dynamicItems++;
		}
	}
	/**
	 * The given item was removed from the list of contributions. Marks the