code: def _data_spec(self):
      return (
          specs.TensorSpec([3], tf.float32, "action"),
          (
              specs.TensorSpec([5], tf.float32, "lidar"),
              specs.TensorSpec([3, 2], tf.float32, "camera"),
          ),
      )
  
file_path: agents/tf_agents/replay_buffers/replay_buffer_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import tensorflow
  from tf_agents import specs
  from tf_agents.replay_buffers import replay_buffer
label_desc: Use image node_id 1 for calling the ReplayBufferInitTest obj's underlying member method code with example usage: obj._data_spec() and returns: specs,  specs,  specs