class Google::Cloud::Storage::Service

def payload_format str_or_bool

Defaults to "JSON_API_V1"
Pub/Sub notification subscription payload_format 
def payload_format str_or_bool
  return "JSON_API_V1" if str_or_bool.nil?
  { "json_api_v1" => "JSON_API_V1",
    "json" => "JSON_API_V1",
    "true" => "JSON_API_V1",
    "none" => "NONE",
    "false" => "NONE" }[str_or_bool.to_s.downcase]
end