Setting Default Values in Tagged Classes or Errors in TypeScript

Is there a way to provide default values when defining a tagged class or error?
i.e. I'm looking for the tagged equivalent of:

export class BadRequest {
  constructor(readonly message = "Bad Request") {}
}

export class BadRequest {
  constructor(readonly message = "Bad Request") {}
}

I can easily define a

export class BadRequest extends Data.TaggedClass("BadRequest")<{ message?: string }> {}

export class BadRequest extends Data.TaggedClass("BadRequest")<{ message?: string }> {}

but I see no way to set a default value for

message

message

if not provided