assertNotNull(res, "null graph after resolver");
        assertNotNull(res.getVertices(), "no vertices in the resulting graph after resolver");

        assertNotNull(res.getExcidentEdges(v1), "no edges in the resulting graph after resolver");

        assertEquals(4, res.getVertices().size(), "wrong # of vertices in the resulting graph after resolver");
        assertEquals(
                2,

        ClasspathContainer res;

        res = transform.transform(graph, ArtifactScopeEnum.compile, false);

        assertNotNull(res, "null classpath container after compile transform");
        assertNotNull(res.getClasspath(), "null classpath after compile transform");
        assertEquals(3, res.getClasspath().size(), "compile classpath should have 3 entries");
    }

        Path beforePomFile =
                Paths.get("src/test/resources/projects/transform/before.pom").toAbsolutePath();
        Path afterPomFile =
                Paths.get("src/test/resources/projects/transform/after.pom").toAbsolutePath();
        Path tempFile = Files.createTempFile("", ".pom");
        Files.delete(tempFile);
        try (InputStream expected = Files.newInputStream(beforePomFile)) {

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Indicates that annotated component should be instantiated before session execution starts
 * and discarded after session execution completes.
 *
 * TODO: this is currently not implemented
 *
 * @since 4.0.0
 */
@Scope
@Documented
@Retention(RUNTIME)
@Target({TYPE, METHOD})

     * @return the mutable transformerContext
     */
    ModelTransformerContext initialize(ModelBuilderRequest request, ModelProblemCollector problems);

    /**
     * The immutable transformerContext, can be used after the buildplan is finished.
     *
     * @return the immutable transformerContext
     */
    ModelTransformerContext build();

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Indicates that annotated component should be instantiated before session execution starts
 * and discarded after session execution completes.
 *
 * TODO: this is currently not implemented
 *
 * @since 4.0.0
 */
@Scope
@Documented
@Retention(RUNTIME)
@Target({TYPE, METHOD})

        if (artifacts == null || artifacts.isEmpty()) {
            if (request.isResolveRoot()) {
                result.addArtifact(rootArtifact);
            }
            return result;
        }

        // After the collection we will have the artifact object in the result but they will not be resolved yet.
        result = artifactCollector.collect(

    //
    // 9) Execute AbstractLifecycleParticipant.afterProjectsRead(session)
    //
    // 10) Create ProjectDependencyGraph without trimming (as trimming was done in 7). A new topological sort is
    // required after the execution of 9) as the AbstractLifecycleParticipants are free to mutate the MavenProject
    // instances, which may change dependencies which can, in turn, affect the build order.
    //

import org.apache.maven.internal.impl.model.DefaultModelTransformerContext.GAKey;
import org.apache.maven.internal.impl.model.DefaultModelTransformerContext.Holder;

/**
 * Builds up the transformer context.
 * After the buildplan is ready, the build()-method returns the immutable context useful during distribution.
 * This is an inner class, as it must be able to call readRawModel()
 *
 * @since 4.0.0
 */

         */
        void update(@Nonnull ByteBuffer input);

        /**
         * Returns the algorithm end result as string, never {@code null}. After invoking this method, this instance should
         * be discarded and not reused. For new checksum calculation you have to get new instance.
         */
        @Nonnull
        String checksum();
    }