[test-results]: https://ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/master/lastCompletedBuild/testReport/
[build-status]: https://img.shields.io/jenkins/s/https/ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/master.svg?
[build-tests]: https://img.shields.io/jenkins/t/https/ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/master.svg?
[maven-home]: https://maven.apache.org/

            if (!src.isEmpty()) {
                List<Plugin> tgt = target.getPlugins();
                Map<Object, Plugin> master = new LinkedHashMap<>(tgt.size() * 2);

                for (Plugin element : tgt) {
                    Object key = getPluginKey().apply(element);
                    master.put(key, element);
                }

                Map<Object, List<Plugin>> predecessors = new LinkedHashMap<>();

                        } catch (Throwable e) {
                          echo "Failure checkout ITs branch: ${ITS_BRANCH} - fallback master branch"
                          checkout([$class: 'GitSCM',
                                  branches: [[name: "*/master"]],
                                  extensions: [[$class: 'CloneOption', depth: 1, noTags: true, shallow: true]],

          repo=maven-integration-testing
          target_branch=master
          target_user=apache
          if [ "$GITHUB_EVENT_NAME" == "pull_request" ]; then
            user=${PR_HEAD_LABEL%:*}
            branch=${PR_HEAD_LABEL#*:}
          else
            user=${GITHUB_REPOSITORY%/*}
            branch=${GITHUB_REF#refs/heads/}
          fi
          if [ $branch != "master" ]; then

                                } catch (Throwable e) {
                                  echo "Failure checkout ITs branch: ${ITS_BRANCH} - fallback master branch"
                                  checkout([$class: 'GitSCM',
                                          branches: [[name: "*/master"]],
                                          extensions: [[$class: 'CloneOption', depth: 1, noTags: true, shallow: true]],

                        master.put(key, plugin);
                    }
                }

                Map<Object, List<Plugin>> predecessors = new LinkedHashMap<>();
                List<Plugin> pending = new ArrayList<>();
                for (Plugin element : tgt) {
                    Object key = getPluginKey().apply(element);
                    Plugin existing = master.get(key);

/**
 * Information about the modules contained in a path element.
 * The path element may be a JAR file or a directory. Directories may use either package hierarchy
 * or module hierarchy, but not module source hierarchy. The latter is excluded because this class
 * is for path elements of compiled codes.
 */
class PathModularization {
    /**
     * A unique constant for all non-modular dependencies.
     */