delegate.addTaskExecutionGraphListener(listener.wrap())
    }

    override fun removeTaskExecutionGraphListener(listener: TaskExecutionGraphListener) {
        delegate.removeTaskExecutionGraphListener(listener.wrap())
    }

    override fun whenReady(closure: Closure<*>) {

    /**
     * <p>Remove a listener from this graph.</p>
     *
     * @param listener The listener to remove. Does nothing if this listener was never added to this graph.
     */
    void removeTaskExecutionGraphListener(TaskExecutionGraphListener listener);

    /**
     * <p>Adds a listener to this graph, to be notified as tasks are executed.</p>
     *

            registrationPoint,
            TaskExecutionGraphListener.class,
            listener
        );
    }

    @Override
    public void removeTaskExecutionGraphListener(TaskExecutionGraphListener listener) {
        graphListeners.remove(listener);
    }

    @Override
    public void whenReady(final Closure closure) {
        graphListeners.add(