reactivemongo.api.commands.IsMasterCommand
(isMasterResult: StringAdd).self
(isMasterResult: StringFormat).self
(isMasterResult: ArrowAssoc[IsMasterResult]).x
(Since version 2.10.0) Use leftOfArrow
instead
(isMasterResult: Ensuring[IsMasterResult]).x
(Since version 2.10.0) Use resultOfEnsuring
instead