can arguments be made case-insensitive? about webargs HOT 2 CLOSED

from webargs import core

class CaseInsensitiveParser(core.Parser):
    def parse_json(self, req, name, arg):
        json = req.json
        lower_keys = {k.lower(): k for k in json}
        if name.lower() in lower_keys:
            return json.get(lower_keys[name.lower()])
        else:
            return core.Missing

    # ...