class DriveHelper {

    public com.google.api.services.drive.model.File createNewFile(@NonNull String name,
                                                                  @Nullable String mimeType,
                                                                  @Nullable String parentId) {
        com.google.api.services.drive.model.File file;
        file = new com.google.api.services.drive.model.File()
                .setName(name)
                .setViewersCanCopyContent(true);

        if (mimeType != null) {
            file.setMimeType(mimeType);
        }
        if (parentId != null) {
            file.setParents(Collections.singletonList(parentId));
        }
        return file;
    }

      DriveHelper(@NonNull GoogleAccountCredential credential,
                @NonNull HttpTransport transport,
                @NonNull JsonFactory jsonFactory);
      DriveHelper(DriveService driveService);

}