class_docstr: Configuration for `BertModel`.
class_docstr_tok: ["Configuration","for","`","BertModel","`","."]
docstr: Serializes this instance to a JSON string.
docstr_tok: ["Serializes","this","instance","to","a","JSON","string","."]
code: def to_json_string(self):
      """Serializes this instance to a JSON string."""
      return json.dumps(self.to_dict(), indent=2, sort_keys=True) + "\n"
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import copy
  import json
  import math
  import re
  import numpy
  import six
  import tensorflow.compat.v1
label_desc: Use image node_id 5 for calling the BertConfig obj's underlying member method code with example usage: obj.to_json_string() and returns: unknown