code: public CompletableFuture<Revision> addRepo(Author author, String projectName, String repoName) {
          return addRepo(author, projectName, repoName, PerRolePermissions.DEFAULT);
      }
docs: Adds a {@link RepositoryMetadata} of the specified {@code repoName} to the specified {@code projectName}
  with a default {@link PerRolePermissions}.