(isSingleColumnType: StringAdd).self
(isSingleColumnType: StringFormat).self
(isSingleColumnType: ArrowAssoc[IsSingleColumnType[T]]).x
(Since version 2.10.0) Use leftOfArrow
instead
(isSingleColumnType: Ensuring[IsSingleColumnType[T]]).x
(Since version 2.10.0) Use resultOfEnsuring
instead