def from_json_file(cls, json_file):
        """Constructs a `BertConfig` from a json file of parameters."""
        with open(json_file, "r", encoding='utf-8') as reader:
            text = reader.read()
        return cls.from_dict(json.loads(text))
Constructs a `BertConfig` from a json file of parameters.
training/bing_bert/nvidia/modelingpreln_layerdrop.py