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