import org.gradle.internal.service.scopes.ServiceScope;

import java.util.Collection;

@ServiceScope(Scope.Build.class)
public interface PluginResolverContributor {
    void collectResolversInto(Collection<PluginResolver> resolvers);

import org.gradle.plugin.use.PluginId;
import org.gradle.plugin.use.internal.DefaultPluginId;

// Used for testing the plugins DSL
public class NoopPluginResolver implements PluginResolver {

    public static final PluginId NOOP_PLUGIN_ID = DefaultPluginId.of("noop");
    private final PluginRegistry pluginRegistry;

    public NoopPluginResolver(PluginRegistry pluginRegistry) {

import org.gradle.plugin.use.PluginId;

import static java.lang.String.format;
import static org.gradle.api.internal.plugins.DefaultPluginManager.CORE_PLUGIN_NAMESPACE;

public class CorePluginResolver implements PluginResolver {

    private final DocumentationRegistry documentationRegistry;
    private final PluginRegistry pluginRegistry;

import org.gradle.plugin.use.PluginId;

import java.util.Iterator;

import static com.google.common.base.Strings.isNullOrEmpty;

public class ArtifactRepositoriesPluginResolver implements PluginResolver {

    public static final String PLUGIN_MARKER_SUFFIX = ".gradle.plugin";

    @VisibleForTesting
    static final String SOURCE_NAME = "Plugin Repositories";

Class <org.gradle.plugin.use.resolve.internal.PluginResolver> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (PluginResolver.java:0)