docs: @Deprecated
      protected RepositoryFile getFileV3(String filePath, Integer projectId, String ref) throws GitLabApiException {
          Form form = new Form();
          addFormParam(form, "file_path", filePath, true);
          addFormParam(form, "ref", ref, true);
          Response response = get(Response.Status.OK, form.asMap(), "projects", projectId, "repository", "files");
          return (response.readEntity(RepositoryFile.class));
      }