The unique identifier for a class. This ID must be unique across all classes from an issuer. This value should follow the format issuer ID.identifier where the former is issued by Google and latter is chosen by you. Your unique identifier should only include alphanumeric characters, '.', '_', or '-'.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-10-23 UTC."],[[["Adds a message to an existing loyalty class identified by its unique ID."],["The request requires an `AddMessageRequest` object in the body and uses the `POST` method."],["A successful response returns the updated `LoyaltyClass` object."],["Authorization requires the `https://www.googleapis.com/auth/wallet_object.issuer` scope."]]],[]]