String key = ArtifactUtils.versionlessKey( groupId, artifactId );

        Map artifactMap = project.getArtifactMap();

        assertNotNull( artifactMap, "artifact-map should not be null." );
        assertEquals( 1, artifactMap.size(), "artifact-map should contain 1 element." );

        Artifact artifact = (Artifact) artifactMap.get( key );

        String var = "${var}";
        String key = var + " with version: ${project.version}";

        Model model = new Model();
        model.setVersion("1");

        MavenProject project = new MavenProject(model);

        ExpressionEvaluator ee = createExpressionEvaluator(project, null, new Properties());

        Object value = ee.evaluate("$" + key);

        assertEquals("${var} with version: 1", value);

                try {
                    return Optional.of(injector.getInstance(Key.of(type, name)));
                } catch (DIException e) {
                    return Optional.empty();
                }
            }

            @Override
            public <T> List<T> lookupList(Class<T> type) {
                return injector.getInstance(new Key<List<T>>() {});
            }

            @Override

        List<Plugin> plugins = project.getBuildPlugins();

        // Plugin0 [plexus]

        String key = "org.apache.maven.plugins:maven-plexus-plugin";

        Plugin plugin = null;
        for (Plugin check : plugins) {
            if (key.equals(check.getKey())) {
                plugin = check;
                break;
            }
        }

        assertNotNull(plugin);

 * interface.
 * @since 3.0.2
 */
public interface EventSpy {
    /**
     * Context
     */
    interface Context {

        /**
         * Gets key-value pairs providing information about the Maven runtime.
         *
         * @return The key-value pairs, never {@code null}.
         */
        Map<String, Object> getData();
    }

    /**
     * Initializes the spy.
     *

     * @return Copy of the given properties.
     */
    public static Properties copyProperties(Properties properties) {
        final Properties copyProperties = new Properties();
        // guard against modification/removal of keys in the given properties (MNG-5670, MNG-6053, MNG-6105)
        synchronized (properties) {
            copyProperties.putAll(properties);
        }
        return copyProperties;
    }

 * {@code org.apache.maven.api.spi.PathScopeProvider}.
 * <p>
 * Implementation must have {@code equals()} and {@code hashCode()} implemented, so implementations of this interface
 * can be used as keys.
 *
 * @since 4.0.0
 * @see org.apache.maven.api.services.DependencyResolver
 * @see DependencyScope
 */
@Experimental
@Immutable
public interface PathScope extends ExtensibleEnum {

    private boolean parallel;

    /**
     * Plugin context keyed by project ({@link MavenProject#getId()}) and by plugin lookup key
     * ({@link PluginDescriptor#getPluginLookupKey()}). Plugin contexts itself are mappings of {@link String} keys to
     * {@link Object} values.
     */
    @SuppressWarnings("checkstyle:linelength")

public interface ToolchainPrivate extends Toolchain {

    /**
     * Let the toolchain decide if it matches requirements defined
     * in the toolchain plugin configuration.
     * @param requirements Map<String, String> key value pair, may not be {@code null}
     * @return {@code true} if the requirements match, otherwise {@code false}
     */
    boolean matchesRequirements(Map<String, String> requirements);

    /**
     *

/**
 * Caches auxiliary data used during model building like already processed raw/effective models. The data in the cache
 * is meant for exclusive consumption by the model builder and is opaque to the cache implementation. The cache key is
 * formed by a combination of group id, artifact id, version and tag. The first three components generally refer to the