when(chatRoomService.getMessage(any(Message.MessageKey.class)))
.thenReturn(Mono.empty());
// Needed for readable error-reports, in case of a bug that leads to according unwanted call
when(chatRoomService.getMessage(any(Message.MessageKey.class)))
.thenReturn(Mono.empty());
// Needed for readable error-reports, in case of a bug that leads to according unwanted call