private AndroidManifest createDummyManifest() {
   return new AndroidManifest(
       null,
       null,
       null,
       !config.packageName().isEmpty() ? config.packageName() : "org.robolectric.default") {
     @Override
     public int getTargetSdkVersion() {
       return SdkConfig.FALLBACK_SDK_VERSION;
     }
   };
 }
 private static String getPackageName(Config config) {
   try {
     final String packageName = config.packageName();
     if (packageName != null && !packageName.isEmpty()) {
       return packageName;
     } else {
       return ReflectionHelpers.getStaticField(config.constants(), "APPLICATION_ID");
     }
   } catch (Throwable e) {
     return null;
   }
 }
  @Override
  public AndroidManifest create() {
    if (config.manifest().equals(Config.NONE)) {
      return createDummyManifest();
    }

    FsFile manifestFile =
        getBaseDir()
            .join(
                config.manifest().equals(Config.DEFAULT_MANIFEST)
                    ? DEFAULT_MANIFEST_NAME
                    : config.manifest().replaceAll("^(\\./)+", ""));
    FsFile baseDir = manifestFile.getParent();
    FsFile resDir = baseDir.join(config.resourceDir());
    FsFile assetDir = baseDir.join(config.assetDir());

    List<FsFile> libraryDirs = null;
    if (config.libraries().length > 0) {
      libraryDirs = new ArrayList<>();
      for (String libraryDirName : config.libraries()) {
        libraryDirs.add(baseDir.join(libraryDirName));
      }
    }

    ManifestIdentifier identifier =
        new ManifestIdentifier(manifestFile, resDir, assetDir, config.packageName(), libraryDirs);
    synchronized (appManifestsByFile) {
      AndroidManifest appManifest;
      appManifest = appManifestsByFile.get(identifier);
      if (appManifest == null) {
        appManifest = createAppManifest(manifestFile, resDir, assetDir, config.packageName());
        appManifestsByFile.put(identifier, appManifest);
      }
      // The AppManifest may STILL be null if no file was found.
      if (appManifest != null) {
        appManifest.setLibraryManifests(createLibraryManifests(appManifest, libraryDirs));
      }
      return appManifest;
    }
  }