class Google::Cloud::Storage::HmacKey::List

def next
  return nil unless next?
  ensure_service!
  gapi = @service.list_hmac_keys \
    service_account_email: @service_account_email,
    show_deleted_keys: @show_deleted_keys, token: @token, max: @max,
    user_project: @user_project
  HmacKey::List.from_gapi \
    gapi, @service,
    service_account_email: @service_account_email,
    show_deleted_keys: @show_deleted_keys, max: @max,
    user_project: @user_project
end