code: def _type_spec(self):
      return _JointDistributionSequentialSpec.from_instance(self)
  
imports: import collections
  import functools
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import joint_distribution
  from tensorflow_probability.python.distributions import kullback_leibler
  from tensorflow_probability.python.internal import auto_composite_tensor
  from tensorflow_probability.python.internal import distribution_util
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 2 for calling the JointDistributionSequential obj's underlying member method code with example usage: obj._type_spec() and returns: _JointDistributionSequentialSpec