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