private static final String MODULE_D = "module-d";
    private static final String MODULE_C_1 = "module-c-1";
    private static final String MODULE_C_2 = "module-c-2";

    private DefaultGraphBuilder graphBuilder;

    private final ProjectBuilder projectBuilder = mock(ProjectBuilder.class);
    private final MavenSession session = mock(MavenSession.class);

              <!-- internal field removed -->
              <exclude>org.apache.maven.graph.DefaultGraphBuilder#projectBuilder</exclude>
              <!-- MavenPluginValidator has been transformed into an interface -->
              <exclude>org.apache.maven.plugin.MavenPluginValidator</exclude>