(invalidMessageException: StringAdd).self
(invalidMessageException: StringFormat).self
(invalidMessageException: ArrowAssoc[InvalidMessageException]).x
(Since version 2.10.0) Use leftOfArrow instead
(invalidMessageException: Ensuring[InvalidMessageException]).x
(Since version 2.10.0) Use resultOfEnsuring instead
InvalidMessageException is thrown when an invalid message is sent to an Actor; Currently only
nullis an invalid message.