code: def __repr__(self):
      return "."
  
imports: import collections
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import prefer_static
  from tensorflow_probability.python.internal import tensor_util
  from tensorflow.python.util import nest
label_desc: Use image node_id 2 for calling the _DotString obj's underlying member method code with example usage: obj.__repr__() and returns: str