*     <li><code>rc</code> or <code>cr</code></li>
 *     <li><code>snapshot</code></li>
 *     <li><code>ga</code> or <code>final</code></li>
 *     <li><code>sp</code></li>
 *     </ol>
 *     Unknown qualifiers are considered after known qualifiers,
 *     with lexical order (case-insensitive in the English locale).
 *     <code>ga</code> and <code>final</code> sort the same as not having a qualifier.
 *   </li>

        for (CoreExtension coreExtension : coreExtensions) {
            String ga = coreExtension.getGroupId() + ":" + coreExtension.getArtifactId();
            InputLocation location = coreExtension.getLocation("");
            gasLocations.computeIfAbsent(ga, k -> new ArrayList<>()).add(location);
            // TODO: metaversions could be extensible enum with these two values out of the box

        this.providedArtifacts = exports.getExportedArtifacts();

        this.providedArtifactsV4 = providedArtifacts.stream()
                .filter(ga -> ga.startsWith("org.apache.maven:maven-api-"))
                .collect(Collectors.toSet());
    }

    private ClassRealm newRealm(String id) {
        synchronized (world) {
            String realmId = id;

            final String filename = "openjdk-" + (isOld ? "1" : "12.0.1") + "_" + effectivePlatform + "-x64_bin." + extension(platform);
            return "/java/GA/" + versionPath + "/GPL/" + filename;
        }
    }

    private static byte[] filebytes(final String vendor, final String platform) throws IOException {

        map.put("ウィ", new String[] { "wi" });
        map.put("ウェ", new String[] { "we" });
        map.put("ウォ", new String[] { "wo" });

        map.put("ガ", new String[] { "ga" });
        map.put("ギ", new String[] { "gi" });
        map.put("グ", new String[] { "gu" });
        map.put("ゲ", new String[] { "ge" });
        map.put("ゴ", new String[] { "go" });

    assertEqualCharNodes(traverser.breadthFirst(charactersOf("a")), "abcd");
    assertEqualCharNodes(traverser.breadthFirst(charactersOf("bg")), "bgcdh");
    assertEqualCharNodes(traverser.breadthFirst(charactersOf("ga")), "gahbcd");
  }

  @Test
  public void forTree_breadthFirst_twoTrees() {
    Iterable<Character> result = Traverser.forTree(TWO_TREES).breadthFirst('a');

    assertEqualCharNodes(result, "ab");
  }

### Other notable improvements

  * Job was Beta in 1.1 and is GA in 1.2 .

                result.getFatals().get(0));
    }

    @Test
    void testInvalidGroupAndArtifactIdInPluginManagement() throws Exception {
        SimpleProblemCollector result = validateRaw("raw-model/missing-ga-pluginManagement.xml");

        assertViolations(result, 2, 0, 0);

        assertEquals(
                "'build.pluginManagement.plugins.plugin.(groupId:artifactId)' groupId of a plugin must be defined. ",