Bug 190061 [Metadata] Update @since tags for new API
Patch to follow
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/Command.java
throw exception;
		}
		
		if ((handler != null) && (handler.isHandled())) {
			if (!isEnabled()) {
				final NotEnabledException exception = new NotEnabledException(
						"Trying to execute the disabled command " + getId()); 
				fireNotEnabled(exception);
				throw exception;
			}
			try {
				final Object returnValue = handler.execute(event);
				firePostExecuteSuccess(returnValue);
				return returnValue;
			} catch (final ExecutionException e) {
				firePostExecuteFailure(e);
				throw e;
			}
		}
		final NotHandledException e = new NotHandledException(
				"There is no handler to execute for command " + getId()); 
		fireNotHandled(e);
		throw e;
	}
	/**
	 * Notifies the listeners for this command that it has changed in some way.
	 * 
	 * @param commandEvent
	 *            The event to send to all of the listener; must not be
	 *            <code>null</code>.