gistfile1.scala

sealed trait ContextDescription {
  def value: String
}
final case class EmailContext(value: String)  extends ContextDescription
final case class MobileContext(value: String) extends ContextDescription
// ...
Seq(EmailContext(email), MobileContext(mobile)).
  filter(_.value.nonEmpty).
  map( context =>
    LocalPersonContext(
      transaction.upload.identityId, 
      context,
      line, 
      existingOrCurrentTimestamp(signupDate)
    )
  )