code: def _dtype(self):
      raise NotImplementedError()
  
imports: from absl.testing import parameterized
  from jax import config
  import numpy
  import tensorflow.compat.v2
  from fun_mc import backend
  from fun_mc import fun_mc_lib
  from fun_mc import test_util
  from fun_mc import util_tfp
label_desc: Use image node_id 1 for calling the UtilTFPTest obj's underlying member method code with example usage: obj._dtype() without return types