Bug 323489 [KeyBindings] Reduce memory footprint of BindingManager
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/BindingManager.java
* disregarding the current contexts. This can be useful when trying to
	 * display all the possible bindings.
	 * </p>
	 * <p>
	 * This method completes in <code>O(n)</code>, where <code>n</code> is
	 * the number of bindings.
	 * </p>
	 * 
	 * @return All of the active bindings (<code>Binding</code>), not sorted
	 *         in any fashion. This collection may be empty, but it is never
	 *         <code>null</code>.
	 */
	public final Collection getActiveBindingsDisregardingContextFlat() {
		final Collection bindingCollections = getActiveBindingsDisregardingContext()
				.values();
		final Collection mergedBindings = new ArrayList();
		final Iterator bindingCollectionItr = bindingCollections.iterator();
		while (bindingCollectionItr.hasNext()) {
			final Collection bindingCollection = (Collection) bindingCollectionItr
					.next();
			if ((bindingCollection != null) && (!bindingCollection.isEmpty())) {
				mergedBindings.addAll(bindingCollection);
			}
		}
		return mergedBindings;
	}
	/**
	 * <p>
	 * Returns the active bindings for a particular command identifier, but
	 * discounting the current contexts. This method operates in O(n) time over