code: def embed_coords(self, coords):
      return tf.stack([coords, 2 * coords - 1], axis=-1)
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import exp
  from tensorflow_probability.python.bijectors import reshape
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.bijectors import scale_matvec_tril
  from tensorflow_probability.python.bijectors import transform_diagonal
  from tensorflow_probability.python.experimental.tangent_spaces import spaces
  from tensorflow_probability.python.experimental.tangent_spaces import spaces_test_util
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 2 for calling the DiscreteZeroSpaceTest obj's underlying member method code with example usage: obj.embed_coords(coords) and returns: tf