(unknownExtendedSection: StringAdd).self
(unknownExtendedSection: StringFormat).self
(unknownExtendedSection: ArrowAssoc[UnknownExtendedSection]).x
(Since version 2.10.0) Use leftOfArrow
instead
(unknownExtendedSection: Ensuring[UnknownExtendedSection]).x
(Since version 2.10.0) Use resultOfEnsuring
instead