final case classConstExpr[F <: CronField](field: F, value: Int, textValue: Option[String] = None)(implicit unit: CronUnit[F], ev: HasCronField[CronUnit, F], ops: IsFieldExpr[EnumerableExpr, F]) extends Expr[F] with DivisibleExpr[F] with EnumerableExpr[F] with Product with Serializable