}

        @Override
        public void assertInState(T expected) {
            throw new IllegalStateException("Expected " + displayName.getDisplayName() + " to be in state " + expected + " but is in state " + state + " and transitioning to " + targetState + ".");
        }

        @Override

                asWorker {
                    controller.transition(TestState.A, TestState.B) {
                        instant.transitioning
                        thread.block()
                    }
                }
            }
            start {
                thread.blockUntil.transitioning
                asWorker {
                    controller.inState(TestState.A) {
                    }
                }

	//
	// gcBlackenEnabled isn't used directly so as to keep this structure
	// unit-testable.
	gcEnabled bool

	// transitioning is true when the GC is in a STW and transitioning between
	// the mark and sweep phases.
	transitioning bool

	// test indicates whether this instance of the struct was made for testing purposes.
	test bool

	bucket struct {
		// Invariants:
		// - fill >= 0

    NEW,

    /** A service in this state is transitioning to {@link #RUNNING}. */
    STARTING,

    /** A service in this state is operational. */
    RUNNING,

    /** A service in this state is transitioning to {@link #TERMINATED}. */
    STOPPING,

    /**

    NEW,

    /** A service in this state is transitioning to {@link #RUNNING}. */
    STARTING,

    /** A service in this state is operational. */
    RUNNING,

    /** A service in this state is transitioning to {@link #TERMINATED}. */
    STOPPING,

    /**

				if new == state && trackReason(st.Reason) {
					tracking[id] = ev
				}
				continue
			}
			// We're tracking this goroutine.
			if new == state {
				// We're tracking this goroutine, but it's just transitioning
				// to the same state (this is a no-ip
				continue
			}
			// The goroutine has transitioned out of the state we care about,
			// so remove it from tracking and record the stack.
			delete(tracking, id)

    @Override
    public GradleInternal getGradle() {
        // Should not ignore other threads, however it is currently possible for this to be queried by tasks at execution time (that is, when another thread is
        // transitioning the task graph state). Instead, it may be better to:
        // - have the threads use some specific immutable view of the build model state instead of requiring direct access to the build model.

  typedef std::pair<std::string, size_t> Key;

  /// \brief The state of a block.
  ///
  /// A block begins in the CREATED stage. The first thread will attempt to read
  /// the block from the filesystem, transitioning the state of the block to
  /// FETCHING. After completing, if the read was successful the state should
  /// be FINISHED. Otherwise the state should be ERROR. A subsequent read can

    public void transition(ModelNodeInternal node, ModelNode.State desired, boolean laterOk) {
        ModelPath path = node.getPath();
        ModelNode.State state = node.getState();

        LOGGER.debug("Project {} - Transitioning model element '{}' from state {} to {}", projectPath, path, state.name(), desired.name());

        if (desired.ordinal() < state.ordinal()) {
            if (laterOk) {
                return;
            } else {

//	gcw := &getg().m.p.ptr().gcw
//	.. call gcw.put() to produce and gcw.tryGet() to consume ..
//
// It's important that any use of gcWork during the mark phase prevent
// the garbage collector from transitioning to mark termination since
// gcWork may locally hold GC work buffers. This can be done by
// disabling preemption (systemstack or acquirem).
type gcWork struct {
	// wbuf1 and wbuf2 are the primary and secondary work buffers.