Bug 190061 [Metadata] Update @since tags for new API
Patch to follow
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/Command.java
*/
	public final boolean isEnabled() {
		if (handler == null) {
			return false;
		}
		return handler.isEnabled();
	}
	/**
	 * Returns whether this command has a handler, and whether this handler is
	 * also handled.
	 * 
	 * @return <code>true</code> if the command is handled; <code>false</code>
	 *         otherwise.
	 */
	public final boolean isHandled() {
		if (handler == null) {
			return false;
		}
		return handler.isHandled();
	}
	/**
	 * Removes a listener from this command.
	 * 
	 * @param commandListener
	 *            The listener to be removed; must not be <code>null</code>.
	 * 
	 */
	public final void removeCommandListener(
			final ICommandListener commandListener) {
		if (commandListener == null) {