import org.gradle.api.provider.Provider;

/**
 * Details of a build service.
 *
 * @param <T> the service type.
 * @param <P> the service parameters type.
 * @since 6.1
 */
public interface BuildServiceRegistration<T extends BuildService<P>, P extends BuildServiceParameters> extends Named {
    /**
     * Returns the parameters that will be used to instantiate the service with.
     */
    P getParameters();

    /**

    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;
    }

    SharedResource forService(BuildServiceProvider<?, ?> service);

    @Nullable
    BuildServiceRegistration<?, ?> findByName(String name);

    @Nullable
    BuildServiceRegistration<?, ?> findByType(Class<?> type);

    @Nullable
    BuildServiceRegistration<?, ?> findRegistration(Class<?> type, String name);

    Set<BuildServiceRegistration<?, ?>> findRegistrations(Class<?> type, String name);

import org.gradle.api.internal.provider.ProviderInternal;
import org.gradle.api.services.BuildService;
import org.gradle.api.services.BuildServiceParameters;
import org.gradle.api.services.BuildServiceRegistration;
import org.gradle.api.services.BuildServiceRegistry;
import org.gradle.internal.Cast;
import org.gradle.internal.service.ServiceRegistry;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

 *
 * @since 6.1
 */
public interface BuildServiceRegistry {
    /**
     * Returns the set of service registrations.
     */
    NamedDomainObjectSet<BuildServiceRegistration<?, ?>> getRegistrations();

    /**
     * Registers a service, if a service with the given name is not already registered. The service is not created until required, when the returned {@link Provider} is queried.
     *

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;