class Google::Cloud::Storage::Service

def restore_file bucket_name,
                 file_path,
                 generation,
                 copy_source_acl: nil,
                 if_generation_match: nil,
                 if_generation_not_match: nil,
                 if_metageneration_match: nil,
                 if_metageneration_not_match: nil,
                 projection: nil,
                 user_project: nil,
                 fields: nil,
                 options: {}
  if options[:retries].nil?
    is_idempotent = retry? generation: generation, if_generation_match: if_generation_match
    options = is_idempotent ? {} : { retries: 0 }
  end
  execute do
    service.restore_object bucket_name, file_path, generation,
                           copy_source_acl: copy_source_acl,
                           if_generation_match: if_generation_match,
                           if_generation_not_match: if_generation_not_match,
                           if_metageneration_match: if_metageneration_match,
                           if_metageneration_not_match: if_metageneration_not_match,
                           projection: projection,
                           user_project: user_project(user_project),
                           fields: fields,
                           options: options
  end
end