code: def default(self, o):
      return _obj_to_json_simple(o)
  
file_path: lit/lit_nlp/lib/serialize.py
imports: import json
  from types import MappingProxyType
  from typing import Any, cast, Optional
  from lit_nlp.api import dtypes
  from lit_nlp.api import types
  import numpy
label_desc: Use image node_id 1 for calling the SimpleJSONEncoder obj's underlying member method code with example usage: obj.default(o) and returns: _obj_to_json_simple