import org.eclipse.aether.impl.scope.InternalScopeManager;
import org.eclipse.aether.internal.impl.scope.ManagedDependencyContextRefiner;
import org.eclipse.aether.internal.impl.scope.ManagedScopeDeriver;
import org.eclipse.aether.internal.impl.scope.ManagedScopeSelector;
import org.eclipse.aether.internal.impl.scope.OptionalDependencySelector;
import org.eclipse.aether.internal.impl.scope.ScopeDependencySelector;

        <artifactId>plexus-jetty6</artifactId>
        <version>${plexusJetty6Version}</version>
        <scope>test</scope>
      </dependency>
      <dependency>
        <groupId>org.sonatype.spice</groupId>
        <artifactId>plexus-webdav</artifactId>
        <version>${plexusWebdavVersion}</version>
        <scope>test</scope>
      </dependency>

      <!--  Wagon -->
      <dependency>

        <artifactId>plexus-jetty6</artifactId>
        <version>${plexusJetty6Version}</version>
        <scope>test</scope>
      </dependency>
      <dependency>
        <groupId>org.sonatype.spice</groupId>
        <artifactId>plexus-webdav</artifactId>
        <version>${plexusWebdavVersion}</version>
        <scope>test</scope>
      </dependency>

      <!--  Wagon -->
      <dependency>

        return createArtifact(id, version, Artifact.SCOPE_COMPILE);
    }

    protected Artifact createArtifact(String id, String version, String scope)
            throws InvalidVersionSpecificationException {
        return createArtifact(id, version, scope, null, false);
    }

    protected Artifact createArtifact(String id, String version, String scope, String inheritedScope, boolean optional)

        return testCompileSourceRoots;
    }

    // TODO let the scope handler deal with this
    private static boolean isCompilePathElement(final String scope) {
        return Artifact.SCOPE_COMPILE.equals(scope)
                || Artifact.SCOPE_PROVIDED.equals(scope)
                || Artifact.SCOPE_SYSTEM.equals(scope);
    }

    // TODO let the scope handler deal with this

    }

    @Nonnull
    default DependencyResolverResult resolve(
            @Nonnull Session session, @Nonnull Project project, @Nonnull PathScope scope) {
        return resolve(DependencyResolverRequest.build(session, project, scope));
    }

    @Nonnull
    default DependencyResolverResult resolve(@Nonnull Session session, @Nonnull DependencyCoordinate dependency) {

            return addDependency(groupId, artifactId, version, scope, (Exclusion) null);
        }

        public ProjectBuilder addDependency(
                String groupId, String artifactId, String version, String scope, Exclusion exclusion) {
            return addDependency(groupId, artifactId, version, scope, null, exclusion);
        }

        MojoExecutionScope scope = new MojoExecutionScope();

        scope.enter();

        Object o1 = new Object();
        scope.seed(Object.class, o1);
        assertSame(o1, scope.scope(Key.get(Object.class), null).get());

        scope.enter();
        Object o2 = new Object();
        scope.seed(Object.class, o2);
        assertSame(o2, scope.scope(Key.get(Object.class), null).get());

     * Shortcut for {@code getService(DependencyResolver.class).flatten(...)}.
     *
     * @param node node for which to get a flattened list
     * @param scope build path scope (main compile, test compile, etc.) of desired nodes
     * @return flattened list of node with the given build path scope
     * @throws org.apache.maven.api.services.DependencyResolverException if the dependency flattening failed
     *

      <artifactId>t07-c</artifactId>
      <version>1.0</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t07-d</artifactId>
      <version>1.1</version>
      <type>jar</type>
      <scope>compile</scope>
      <optional>true</optional>
    </dependency>
  </dependencies>