in chz/blueprint/_argmap.py [0:0]
def get_kv(self, exact_key: str) -> tuple[str, Any] | None:
if exact_key in self.qualified:
return exact_key, self.qualified[exact_key]
for wildcard_key, value in self.wildcard.items():
if self._to_regex[wildcard_key].fullmatch(exact_key):
return wildcard_key, value
return None