> message("Message")
Message: Message

> # With calls
> warning("Warning")
Warning in eval(expr, envir, enclos): Warning

> stop("Error")
Error in eval(expr, envir, enclos): Error

> # Without calls
> warning("Warning", call. = FALSE)
Warning: Warning

> stop("Error", call. = FALSE)
Error: Error

> # With `conditionMessage()` method
> cnd_signal(message_cnd("foobar", message = "Message"))
Message: Dispatched! Message

> cnd_signal(warning_cnd("foobar", message = "Warning"))
Warning: Dispatched! Warning

> cnd_signal(error_cnd("foobar", message = "Error"))
Error: Dispatched! Error

