I'd use a gateway class and intention-revealing method names, even if all that method was doing was casting a value. I'd call it ".edge_case_fix", (but describe

I'd use a gateway class and intention-revealing method names, even if all that method was doing was casting a value. I'd call it ".edge_case_fix", (but described better than "edge case") and do the same for every weirdness in the external system that requires workarounds.