Is the object an error value, such as a mirai timeout, a 'miraiError' from failed execution within a mirai or a 'miraiInterrupt' resulting from the user interrupt of an ongoing mirai evaluation.
is_error_value(x)
an object.
Logical TRUE if 'x' is of class 'errorValue', FALSE otherwise.
is_error_value(1L)
#> [1] FALSE