Generated type should be partial in case of a Record with an enum as key type

[MatteoTurri]

The following case class in Scala

case class Info(
  paymentModes: Map[PaymentMode, String]
)

where PaymentMode is an enum defined as

@enum trait PaymentMode {
  object Cash
  object Voucher
  object CreditCard
}

is translated as

export interface Info {
  paymentModes: { [key in PaymentMode]: string }
}

The key of the generated type is wrong, as it should be optional (e.g. {} should be a valid value for paymentModes)