@Nonnull
    private final InternalMavenSession session;

    private final Map<String, Path> paths = new ConcurrentHashMap<>();

    @Inject
    public DefaultArtifactManager(@Nonnull InternalMavenSession session) {
        this.session = session;
    }

    @Nonnull
    @Override
    public Optional<Path> getPath(@Nonnull Artifact artifact) {

     */
    @Nonnull
    Optional<Source> getInstallationToolchainsSource();

    /**
     * Gets the user Toolchains source.
     *
     * @return the user Toolchains source or {@code null} if none
     */
    @Nonnull
    Optional<Source> getUserToolchainsSource();

    @Nonnull
    static ToolchainsBuilderRequest build(
            @Nonnull ProtoSession session,

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 *
 * @since 4.0.0
 */
@Experimental
public interface VersionResolverResult extends Result<VersionResolverRequest> {

    @Nonnull
    List<Exception> getExceptions();

    @Nonnull
    Version getVersion();

    @Nonnull
    Optional<Repository> getRepository();

@Target(ElementType.TYPE)
@Inherited
public @interface Mojo {
    /**
     * goal name (required).
     * @return the goal name
     */
    @Nonnull
    String name();

    /**
     * default phase to bind your mojo.
     * @return the default phase
     */
    @Nonnull
    String defaultPhase() default "";

    /**
     * does your mojo requires a project to be executed?
     * @return requires a project
     */

 */
package org.apache.maven.api.services;

import java.util.List;

import org.apache.maven.api.Service;
import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.annotations.Nullable;

/**
 * Service used to interact with the end user.
 *
 * @since 4.0.0
 */
@Experimental
public interface Prompter extends Service {
    /**

     * (prefixed with {@code env.}).
     *
     * @return the system properties, never {@code null}
     */
    @Nonnull
    Map<String, String> getSystemProperties();

    /**
     * Returns the properly overlaid map of properties: system + user.
     */
    @Nonnull
    Map<String, String> getEffectiveProperties();

    /**
     * Returns the start time of the session.
     *

                    Arrays.spliterator(new String[] {"abc", "", "de", "f", "g", ""}),
                    (String str) -> charactersOf(str).spliterator(),
                    Spliterator.SIZED | Spliterator.DISTINCT | Spliterator.NONNULL,
                    7))
        .expect('a', 'b', 'c', 'd', 'e', 'f', 'g');
  }

  public void testFlatMap_nullStream() {
    SpliteratorTester.of(
            () ->
                CollectSpliterators.flatMap(

     * @return the phase
     */
    @Nonnull
    String phase() default "";

    /**
     * Goal to fork. Note that specifying a phase overrides specifying a goal. The specified <code>goal</code> must be
     * another goal of the same plugin.
     * @return the goal
     */
    @Nonnull
    String goal() default "";

    /**

import org.apache.maven.api.annotations.Nonnull;

/**
 *
 * @since 4.0.0
 */
@Experimental
public interface ArtifactManager extends Service {

    /**
     * Returns the path of the file previously associated to this artifact
     * or {@code Optional.empty()} if no path has been associated.
     */
    @Nonnull
    Optional<Path> getPath(@Nonnull Artifact artifact);

    /**

     * a <abbr>JAR</abbr> containing test classes, a POM file, <i>etc.</i>
     */
    @Nonnull
    Type getType();

    /**
     * {@return the time at which the dependency will be used}
     * It may be, for example, at compile time only, at run time, or at test time.
     */
    @Nonnull
    DependencyScope getScope();

    /**