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