Bug 182714 [Contributions] Improve toolbar configurability
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ContributionManager.java
* 
	 * @return the number of contributions in this manager
	 * @since 3.3
	 */
	public int getSize() {
		return contributions.size();
	}
	/**
	 * The <code>ContributionManager</code> implementation of this method
	 * declared on <code>IContributionManager</code> returns the current
	 * overrides. If there is no overrides it lazily creates one which overrides
	 * no item state.
	 * 
	 * @since 2.0
	 */
	public IContributionManagerOverrides getOverrides() {
		if (overrides == null) {
			overrides = new IContributionManagerOverrides() {
				public Boolean getEnabled(IContributionItem item) {
					return null;
				}
				public Integer getAccelerator(IContributionItem item) {
					return null;
				}
				public String getAcceleratorText(IContributionItem item) {
					return null;
				}
				public String getText(IContributionItem item) {
					return null;
				}