(isMasterCommand: StringAdd).self
(isMasterCommand: StringFormat).self
(isMasterCommand: ArrowAssoc[IsMasterCommand[P]]).x
(Since version 2.10.0) Use leftOfArrow
instead
(isMasterCommand: Ensuring[IsMasterCommand[P]]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
(Since version 0.16.0) Internal: will be made private