projectId,
                        conflictingProject.getFile(),
                        project.getFile(),
                        "Project '" + projectId + "' is duplicated in the reactor");
            }

            String projectKey = ArtifactUtils.versionlessKey(project.getGroupId(), project.getArtifactId());

            Map<String, Vertex> vertices = vertexMap.computeIfAbsent(projectKey, k -> new HashMap<>(2, 1));

        writer.accept("=== PROJECT BUILD PLAN ================================================");
        writer.accept("Project:                     " + getKey(project));
        writer.accept("Repositories (dependencies): " + project.getRemoteProjectRepositories());
        writer.accept("Repositories (plugins):      " + project.getRemotePluginRepositories());

        Optional<BuildStep> planStep = plan.step(project, BuildStep.PLAN);

        }
    }

    publications.withType<MavenPublication>().configureEach {
        pom {
            description = provider {
                require(project.description != null) { "You must set the description of published project ${project.name}" }
                project.description
            }
            url = "https://gradle.org"
            licenses {
                license {
                    name = "Apache-2.0"

        return Collections.unmodifiableList(activations);
    }

    /**
     * Adds a project activation to the request.
     * @param selector The selector of the project.
     * @param active Should the project be activated?
     * @param optional Can the build continue if the project does not exist?
     */
    public void addProjectActivation(String selector, boolean active, boolean optional) {

     * collected from this method in combination with a custom cache implementation to dispose unused records from the
     * cache.
     *
     * @param project The project that employs the plugin realm, must not be {@code null}.
     * @param record The cache record being used for the project, must not be {@code null}.
     */

                }
            }
        } else {
            MavenProject project = createStubMavenProject();
            project.setRemoteArtifactRepositories(request.getRemoteRepositories());
            project.setPluginArtifactRepositories(request.getPluginArtifactRepositories());
            projects.add(project);
        }

import org.apache.maven.model.building.Result;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuilder;
import org.apache.maven.project.ProjectBuildingException;
import org.apache.maven.project.ProjectBuildingRequest;
import org.apache.maven.project.ProjectBuildingResult;
import org.apache.maven.project.collector.DefaultProjectsSelector;
import org.apache.maven.project.collector.MultiModuleCollectionStrategy;

     *
     * @return The problems that were encountered during the project building, can be empty but never {@code null}.
     */
    List<ModelProblem> getProblems();

    /**
     * Gets the result of the dependency resolution for the project.
     *
     * @return The result of the dependency resolution for the project or {@code null} if the project dependencies were

import java.io.File;

/**
 * Locates a POM file within a project base directory.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface ModelLocator {

    /**
     * Locates the POM file within the specified project directory. In case the given project directory does not exist

  </description>

  <build>
    <!-- project extensions should precede inherited extensions -->
    <extensions>
      <extension>
        <groupId>org.apache.maven.its.mng3899</groupId>
        <artifactId>b</artifactId>
        <version>0.1</version>
      </extension>
      <extension>
        <!-- project extensions should override inherited extension with equal gid:aid -->