code: def _xexp_delta_squared_numpy(u, delta):
      """Inverse of the W_delta() function: z = u * exp(0.5 * delta * u**2)."""
      return u * np.exp(0.5 * delta * np.square(u))
  
imports: from absl.testing import parameterized
  import numpy
  from scipy import special
  from scipy import stats
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import lambertw_transform
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 3 for calling a global function with example usage: _xexp_delta_squared_numpy(u, delta) and returns: unknown