(slashOrEmpty: StringAdd).+(other)
(slashOrEmpty: StringAdd).self
(slashOrEmpty: StringFormat).self
(slashOrEmpty: ArrowAssoc[SlashOrEmpty]).x
(Since version 2.10.0) Use leftOfArrow
instead
(slashOrEmpty: Ensuring[SlashOrEmpty]).x
(Since version 2.10.0) Use resultOfEnsuring
instead