Bug 323489 [KeyBindings] Reduce memory footprint of BindingManager
bundles/org.eclipse.jface/src/org/eclipse/jface/bindings/BindingManager.java
* methods states the current run-time performance. In future releases, it is
 * guaranteed that the method will run in at least the stated time constraint --
 * though it might get faster. Where possible, we have also tried to be memory
 * efficient.
 * </p>
 * 
 * @since 3.1
 */
public final class BindingManager extends HandleObjectManager implements
		IContextManagerListener, ISchemeListener {
	/**
	 * This flag can be set to <code>true</code> if the binding manager should
	 * print information to <code>System.out</code> when certain boundary
	 * conditions occur.
	 */
	public static boolean DEBUG = false;
	/**
	 * Returned for optimized lookup.
	 */
	private static final TriggerSequence[] EMPTY_TRIGGER_SEQUENCE = new TriggerSequence[0];
	/**
	 * The separator character used in locales.
	 */
	private static final String LOCALE_SEPARATOR = "_"; 
	private Map currentConflicts = null;
	/**
	 * </p>
	 * A utility method for adding entries to a map. The map is checked for
	 * entries at the key. If such an entry exists, it is expected to be a
	 * <code>Collection</code>. The value is then appended to the collection.