/**
 * Signals an error when resolving the path to an external model.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class UnresolvableModelException extends Exception {

    /**
     * The group id of the unresolvable model.
     */
    private final String groupId;

    /**
     * The artifact id of the unresolvable model.
     */

        parent.setGroupId("org.apache");
        parent.setArtifactId("apache");
        parent.setVersion("0");

        UnresolvableModelException e = assertThrows(
                UnresolvableModelException.class,
                () -> newModelResolver().resolveModel(parent),
                "Expected 'UnresolvableModelException' not thrown.");
        assertNotNull(e.getMessage());

        parent.setArtifactId("artifact");
        parent.setVersion("0");

        UnresolvableModelException e = assertThrows(
                UnresolvableModelException.class,
                () -> newModelResolver().resolveModel(parent),
                "Expected 'UnresolvableModelException' not thrown.");
        assertNotNull(e.getMessage());

     * @return The source of the requested POM, never {@code null}.
     * @throws UnresolvableModelException If the POM could not be resolved from any configured repository.
     */
    ModelSource resolveModel(String groupId, String artifactId, String version) throws UnresolvableModelException;

    /**
     * Tries to resolve the POM for the specified parent coordinates possibly updating {@code parent}.

public interface WorkspaceModelResolver {

    Model resolveRawModel(String groupId, String artifactId, String versionConstraint)
            throws UnresolvableModelException;

    Model resolveEffectiveModel(String groupId, String artifactId, String versionConstraint)
            throws UnresolvableModelException;

            };
        }

        @Override
        public ModelSource resolveModel(Parent parent) throws UnresolvableModelException {
            return null;
        }

        @Override
        public ModelSource resolveModel(Dependency dependency) throws UnresolvableModelException {
            return null;
        }

        @Override