import static org.gradle.internal.operations.BuildOperationCategory.RUN_MAIN_TASKS;
import static org.gradle.internal.operations.BuildOperationCategory.RUN_WORK;

public class BuildPhaseOperationListener implements BuildOperationListener {

    private static final Set<BuildOperationCategory> SUPPORTED_CATEGORIES = Collections.unmodifiableSet(EnumSet.of(
        CONFIGURE_ROOT_BUILD,
        CONFIGURE_BUILD,

            listeners.add(new ClientForwardingTestOutputOperationListener(progressEventConsumer, idFactory));
        }

        if (subscriptions.isRequested(OperationType.BUILD_PHASE)) {
            listeners.add(new BuildPhaseOperationListener(progressEventConsumer, idFactory));
        }

        listeners.add(createClientBuildEventGenerator(subscriptions, consumer, progressEventConsumer));
        return listeners.build();
    }

Class <org.gradle.tooling.internal.provider.runner.BuildPhaseOperationListener> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (BuildPhaseOperationListener.java:0)