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