* @param completion - The completion of the asynchronous work
     * @throws IllegalStateException when new work is submitted for an operation while another thread is waiting in {@link #waitForCompletion(BuildOperationRef, ProjectLockRetention)} for the same operation.
     */
    void registerWork(BuildOperationRef operation, AsyncWorkCompletion completion);

    /**

                // when performed from a worker thread (see DefaultBuildOperationQueue.waitForCompletion() which intentionally does not release the project locks while waiting)
                // TODO - add validation to fail eagerly when a worker attempts to lock a project
                //