// ConflictResolver methods -----------------------------------------------

    /*
     * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {

    <dependency>
      <groupId>org.apache.maven.resolver</groupId>
      <artifactId>maven-resolver-api</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven.resolver</groupId>
      <artifactId>maven-resolver-spi</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven.resolver</groupId>
      <artifactId>maven-resolver-util</artifactId>
    </dependency>
    <dependency>

        res = resolver.resolveConflicts(graph, ArtifactScopeEnum.runtime);

        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");

    // ConflictResolver methods -----------------------------------------------

    /*
     * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        try {

    /**
     * Clones this resolver for usage in a forked resolution process. In general, implementors need not provide a deep
     * clone. The only requirement is that invocations of {@link #addRepository(Repository)} on the clone do not affect
     * the state of the original resolver and vice versa.
     *
     * @return The cloned resolver, never {@code null}.
     */
    ModelResolver newCopy();

    // ConflictResolver methods -----------------------------------------------

    /*
     * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {
        try {

import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.resolver.ArtifactResolutionRequest;
import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
import org.apache.maven.artifact.resolver.MultipleArtifactsNotFoundException;
import org.apache.maven.artifact.resolver.ResolutionErrorHandler;

import org.apache.maven.artifact.resolver.ResolutionListener;
import org.apache.maven.artifact.resolver.filter.ArtifactFilter;
import org.apache.maven.repository.legacy.resolver.conflict.ConflictResolver;

/**
 * Artifact collector - takes a set of original artifacts and resolves all of the best versions to use
 * along with their metadata. No artifacts are downloaded.
 *
 */
@Deprecated
@SuppressWarnings("checkstyle:parameternumber")

import org.apache.maven.repository.legacy.resolver.transform.ArtifactTransformation;
import org.apache.maven.repository.legacy.resolver.transform.ArtifactTransformationManager;
import org.apache.maven.repository.legacy.resolver.transform.LatestArtifactTransformation;
import org.apache.maven.repository.legacy.resolver.transform.ReleaseArtifactTransformation;
import org.apache.maven.repository.legacy.resolver.transform.SnapshotTransformation;

    public void test_toAscii() {
        IdnDnsResolver resolver = new IdnDnsResolver();

        String host = "www.codelibs.org";
        String expected = "www.codelibs.org";
        assertEquals(expected, resolver.toAscii(host));

        host = "テスト.org";
        expected = "xn--zckzah.org";
        assertEquals(expected, resolver.toAscii(host));

        host = "xn--zckzah.org";