private <U> U withRegistrations(Function<NamedDomainObjectSet<BuildServiceRegistration<?, ?>>, U> function) {
        registrationsLock.lock();
        try {
            return function.apply(registrations);
        } finally {
            registrationsLock.unlock();
        }
    }

    @Override
    public NamedDomainObjectSet<BuildServiceRegistration<?, ?>> getRegistrations() {
        return registrations;
    }

import org.gradle.api.plugins.ExtensionAware;
import org.gradle.api.provider.Property;
import org.gradle.api.provider.Provider;
import org.gradle.api.services.BuildService;
import org.gradle.api.services.BuildServiceRegistration;
import org.gradle.api.specs.Spec;
import org.gradle.api.tasks.Internal;
import org.gradle.api.tasks.TaskDependency;
import org.gradle.api.tasks.TaskDestroyables;
import org.gradle.api.tasks.TaskInputs;