The following additional public methods could be supported for the attribution string:
full_name, conflicts, dependencies, platform, specification_version, summary, cert_chain, description, email, extensions, licenses, metadata, post_install_message, rg_full_gem_path, location, git_version, rg_extension_dir, nondevelopment_dependencies, default_executable, original_platform, gems_dir, groups, requirements, bin_file, executables, bindir, loaded_from, hash, files, spec_file, abbreviate, bin_dir, default_value, doc_dir, mark_version, executable, file_name, rubygems_version, lib_files, license, name_tuple, original_name, require_path, ri_dir, spec_dir, spec_name, source, validate_permissions, extension_dir, full_gem_path, remote, base_dir, gem_dir, normalize, match_platform, plugins, source_paths, datadir, require_paths, and this.