keras/src/layers/preprocessing/integer_lookup.py/IntegerLookup/get_config
class IntegerLookup:    def get_config(self):
        config = super().get_config()
        if config["oov_token"] is not None:
            config["oov_token"] = int(config["oov_token"])
        if config["mask_token"] is not None:
            config["mask_token"] = int(config["mask_token"])
        if config["vocabulary"] is not None:
            config["vocabulary"] = [int(v) for v in config["vocabulary"]]
        return config