if (repositoryUrl.contains("${")) {
            // the repository url contains unresolved properties and getting the basedir is not possible
            // in JDK 20+ 'new URL(string)' will fail if the string contains a curly brace
            this.basedir = null;
        } else {
            try {
                URL url = new URL(repository.getUrl());
                if ("file".equals(url.getProtocol())) {

        return sb.toString();
    }

    public Artifact find(Artifact artifact) {
        File artifactFile = new File(getBasedir(), pathOf(artifact));

        // We need to set the file here or the resolver will fail with an NPE, not fully equipped to deal
        // with multiple local repository implementations yet.
        artifact.setFile(artifactFile);

        if (artifactFile.exists()) {
            artifact.setResolved(true);

                        BuilderProblem.Severity.WARNING,
                        prefix + ".layout",
                        repository.getId(),
                        "uses the unsupported value 'legacy', artifact resolution might fail.");
            }
        }
    }

    // ----------------------------------------------------------------------
    // Field validation

        <field>
          <name>checksumPolicy</name>
          <version>4.0.0+</version>
          <description>
            What to do when verification of an artifact checksum fails. Valid values are
            {@code ignore},
            {@code fail} (default for Maven 4 and above) or
            {@code warn} (default for Maven 2 and 3).
          </description>
          <type>String</type>
        </field>

    }

    @Test
    void testVerifyExpectedParentStructure() throws CycleDetectedException, DuplicateProjectException {
        // This test verifies the baseline structure used in subsequent tests. If this fails, the rest will fail.
        ProjectDependencyGraph graph = threeProjectsDependingOnASingle();
        final List<MavenProject> sortedProjects = graph.getSortedProjects();
        assertEquals(aProject, sortedProjects.get(0));

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        resolutionErrorHandler.throwErrors(request, result);
        assertEquals(1, result.getArtifacts().size());

        //
        // Put in a bogus file to make sure missing files cause the resolution to fail.
        //
        file = new File(getBasedir(), "src/test/repository-system/maven-monkey-2.1.0.jar");
        assertFalse(file.exists());
        d.setSystemPath(file.getCanonicalPath());

import java.util.stream.Stream;

import static java.util.stream.Collectors.toSet;

/**
 * Container for storing the request from the user to activate or deactivate certain projects and optionally fail the
 * build if those projects do not exist.
 */
public class ProjectActivation {
    private static class ProjectActivationSettings {
        /**