We need to turn this list of phases into a set of plugin objects that have an XML representation like the following:

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-resources-plugin</artifactId>
    <executions>
      <execution>
        <goals>
          <goal>process</goal>
        </goals>
      </execution>
    </executions>
  </plugin>
  .
  .
  .
</plugins>

     * Sets the configuration to the configuration taken from the specified build plugin in the POM. First, the build
     * plugins will be searched for the specified plugin, if that fails, the plugin management section will be searched.
     *
     * @param model The POM to extract the plugin configuration from, may be {@code null}.
     * @param pluginGroupId The group id of the plugin whose configuration should be used, must not be {@code null} or

        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {
            PluginExecution pluginExecution = new PluginExecution();
            pluginExecution.setId("default-" + goal);
            pluginExecution.addGoal(goal);
            plugin.addExecution(pluginExecution);

              </params>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>com.github.siom79.japicmp</groupId>
        <artifactId>japicmp-maven-plugin</artifactId>
        <configuration>
          <parameter>
            <includes>
              <include>org.apache.maven.toolchain.model</include>

        } else {
            plugins = Collections.emptySet();
        }

        return plugins;
    }

    private Plugin newPlugin(String artifactId, String... goals) {
        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {
            PluginExecution pluginExecution = new PluginExecution();

        InputLocation pluginLocation = null;
        for (Plugin plugin : project.getBuildPlugins()) {
            if (plugin.getKey().equals("org.apache.maven.plugins:maven-clean-plugin")) {
                pluginLocation = plugin.getLocation("version");
            }
        }
        assertNotNull(pluginLocation, "missing build plugin");
        assertEquals(

<project>
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.apache.maven.test</groupId>
  <artifactId>project-with-build-extensions-plugin</artifactId>
  <version>1.0</version>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin</artifactId>
        <version>0.1</version>
        <extensions>true</extensions>
        <executions>
          <execution>

                </reports>
                <inherited>false</inherited>
              </reportSet>
            </reportSets>
          </plugin>
          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-jxr-plugin</artifactId>
            <reportSets>
              <reportSet>
                <id>aggregate</id>
                <reports>

    Object getPluginComponent(Plugin plugin, String role, String roleHint)
            throws PluginManagerException, ComponentLookupException;

    Map<String, Object> getPluginComponents(Plugin plugin, String role)
            throws ComponentLookupException, PluginManagerException;

    /**
     * @since 2.2.1
     */
    PluginDescriptor loadPluginDescriptor(Plugin plugin, MavenProject project, MavenSession session)

     * Creates a new class realm for the specified plugin.
     *
     * @param plugin The plugin for which to create a realm, must not be {@code null}.
     * @param parent The parent realm for the new realm, may be {@code null}.
     * @param parentImports The packages/types to import from the parent realm, may be {@code null}.
     * @param foreignImports The packages/types to import from foreign realms, may be {@code null}.