is_failure() to test for return and error codes of failed method calls
is_failure() to test for return and error codes of failed method calls

jeffreykegler/libmarpa,pczarn/kollos,pczarn/kollos,jeffreykegler/kollos,jeffreykegler/libmarpa,jeffreykegler/libmarpa,pczarn/kollos,pczarn/kollos,jeffreykegler/kollos,pczarn/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos,jeffreykegler/kollos,jeffreykegler/libmarpa,jeffreykegler/kollos