}

    /**
     * Create a remote deployment repository.
     *
     * @param id            the unique identifier of the repository
     * @param url           the URL of the repository
     * @param layout        the layout of the repository
     * @param uniqueVersion whether to assign each snapshot a unique version
     */

                            problems,
                            BuilderProblem.Severity.WARNING,
                            "servers.server.id",
                            null,
                            "must be unique but found duplicate server with id " + server.getId());
                }
            }
        }

        List<Mirror> mirrors = settings.getMirrors();

        if (mirrors != null) {

   |-->
  <servers>
    <!-- server
     | Specifies the authentication information to use when connecting to a particular server, identified by
     | a unique name within the system (referred to by the 'id' attribute below).
     |
     | NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
     |       used together.
     |

            TaskSegment taskSegment,
            Map<MavenProject, ProjectSegment> projectBuildList,
            ThreadOutputMuxer muxer) {
        // gather artifactIds which are not unique so that the respective thread names can be extended with the groupId
        Set<String> duplicateArtifactIds = projectBuildList.keySet().stream()
                .map(MavenProject::getArtifactId)

 * 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.
     */
    public static final PathModularization NONE = new PathModularization();

    /**

                            errOn30,
                            Version.V20,
                            "profiles.profile.id",
                            null,
                            "must be unique but found duplicate profile with id " + profile.getId(),
                            profile);
                }

                validate30RawProfileActivation(problems, profile.getActivation(), prefix);

            return Optional.empty();
        }

        @Override
        public String option(Iterable<? extends Path> paths) {
            return "";
        }
    };

    /**
     * Returns the unique name of this path type, including the module to patch if any.
     * For example, if this type is {@link JavaPathType#MODULES}, then this method returns {@code "MODULES"}.

          <name>snapshotVersions</name>
          <version>1.1.0+</version>
          <description>Information for each sub-artifact available in this artifact snapshot. This is only the most recent SNAPSHOT for each unique extension/classifier combination.</description>
          <association>
            <type>SnapshotVersion</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>
      </fields>

      ]]></description>
      <fields>
        <field>
          <name>id</name>
          <version>1.0.0</version>
          <description><![CDATA[
            A unique identifier for a repository.
          ]]></description>
          <type>String</type>
        </field>
        <field>
          <name>name</name>
          <version>1.0.0</version>

                () -> buildPom("unique-repo-id/artifact-repo"),
                "Non-unique repository ids did not cause validation error");
    }

    /* MNG-4193 */
    @Test
    void testValidationErrorUponNonUniquePluginRepositoryId() throws Exception {
        assertThrows(
                ProjectBuildingException.class,
                () -> buildPom("unique-repo-id/plugin-repo"),