SimpleSql#onのargsについて

Anorm.scala

  case class ParameterValue[A](aValue: A, statementSetter: ToStatement[A]) {
    def set(s: java.sql.PreparedStatement, index: Int) = statementSetter.set(s, index, aValue)
  }

  case class SimpleSql[T](sql: SqlQuery, params: Seq[(String, ParameterValue[_])], defaultParser: RowParser[T]) extends Sql {

    def on(args: (Any, ParameterValue[_])*): SimpleSql[T] = this.copy(params = (this.params) ++ args.map {
      case (s: Symbol, v) => (s.name, v)
      case (k, v) => (k.toString, v)
    })
  } 

def on(args: (Any, ParameterValue[Any])*): SimpleSql[T] でも同じですか？