def _unescape_key(string):
    if string.startswith('__') and string.lstrip('_') in ('type', 'meta'):
        return string[1:]
    return string
Unescape '__type' and '__meta' keys if they occur.
dataset/ETHPy150Open core-api/python-client/coreapi/codecs/corejson.py/_unescape_key