assertEquals(3, pluginGroups.size());
        assertEquals("org.apache.maven.plugins", pluginGroups.get(0));
        assertEquals("org.codehaus.modello", pluginGroups.get(1));
        assertEquals("org.codehaus.plexus", pluginGroups.get(2));
    }

    @Test
    void testRoundTripProfiles() {
        Random entropy = new Random();
        ActivationFile af = ActivationFile.newBuilder()

specific language governing permissions and limitations
under the License.
-->

<settings xmlns='http://maven.apache.org/SETTINGS/1.0.0'>
  <pluginGroups>
    <pluginGroup>org.codehaus.tycho</pluginGroup>
    <pluginGroup>org.sonatype.pwt</pluginGroup>
  </pluginGroups>

    }

    @Override
    public List<String> getPluginGroups() {
        return pluginGroups;
    }

    @Override
    public DefaultPluginPrefixRequest setPluginGroups(List<String> pluginGroups) {
        if (pluginGroups != null) {
            this.pluginGroups = Collections.unmodifiableList(pluginGroups);
        } else {
            this.pluginGroups = Collections.emptyList();
        }

        return this;
    }

        }

        List<String> pluginGroups = settings.getPluginGroups();

        if (pluginGroups != null) {
            for (int i = 0; i < pluginGroups.size(); i++) {
                String pluginGroup = pluginGroups.get(i).trim();

                if (pluginGroup.isEmpty()) {
                    addViolation(
                            problems, Severity.ERROR, "pluginGroups.pluginGroup[" + i + "]", null, "must not be empty");

    <pluginGroup>com.your.plugins</pluginGroup>
    -->
  </pluginGroups>

  <!-- TODO Since when can proxies be selected as depicted? -->
  <!-- proxies
   | This is a list of proxies which can be used on this machine to connect to the network.
   | Unless otherwise specified (by system property or command-line switch), the first proxy
   | specification in this list marked as active will be used.
   |-->

                        .map(SettingsUtilsV4::convertToSettingsProfile)
                        .collect(Collectors.toList()))
                .activeProfiles(request.getActiveProfiles())
                .pluginGroups(request.getPluginGroups())
                .build());
    }

    @Deprecated
    public List<MavenProject> getSortedProjects() {
        return getProjects();
    }

    @Deprecated
    //

          </description>
          <association>
            <type>String</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>
        <field>
          <name>pluginGroups</name>
          <version>1.0.0+</version>
          <description>
            List of groupIds to search for a plugin when that plugin
            groupId is not explicitly provided.
          </description>

                        if (request.getPrefix().equals(plugin.getPrefix())
                                && (candidates.get(pluginGroup) == null
                                        || candidates.get(pluginGroup).contains(plugin.getArtifactId()))) {
                            return new DefaultPluginPrefixResult(pluginGroup, plugin.getArtifactId(), repository);
                        }
                    }
                }