(if-Unmodified-Since: StringAdd).self
(if-Unmodified-Since: StringFormat).self
(if-Unmodified-Since: ArrowAssoc[If-Unmodified-Since]).x
(Since version 2.10.0) Use leftOfArrow
instead
(if-Unmodified-Since: Ensuring[If-Unmodified-Since]).x
(Since version 2.10.0) Use resultOfEnsuring
instead