code: def testObservationSpec(self):
      env = suite_dm_control.load("ball_in_cup", "catch")
      obs_spec = env.observation_spec()
      self.assertEqual(np.float32, obs_spec["position"].dtype)
      self.assertEqual((4,), obs_spec["position"].shape)
  
file_path: agents/tf_agents/environments/suite_dm_control_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  from tf_agents.environments import py_environment
  from tf_agents.environments import suite_dm_control
  from tf_agents.environments import utils
  from tf_agents.utils import test_utils
label_desc: Use image node_id 3 for calling the SuiteDMControlTest obj's underlying member method code with example usage: obj.testObservationSpec() without return types