JsonFeatureFlag

// Step 1: Define the object we expect to get from the JSON flag
data class PaymentConfiguration(
  val fraudulent: Boolean,
  val vipTreatment: Boolean,
  val specialDescription: String
)

// Step 2: Define the feature flag
data class PaymentConfigurationFeature(
  // Put the `key` and `attributes` here
  val customerId: String,
  val extraAttribute: String
) : JsonFeatureFlag<PaymentConfiguration> {
  override val feature = Feature("payment-configuration-feature")
  override val key = customerId
  override val attributes = Attributes()
    .with("extraAttribute", extraAttribute)
  override val returnType = PaymentConfiguration::class
}