code: def test_builder_atanh_eval(self):
      val = np.array(
          [[-0.8, -0.5, 0], [0.4, 0.5, 0.8]], dtype=np.float32
      )
      v = mb.atanh(x=val)
      expected_outputs = np.array(
          [
              [-1.09861229, -0.54930614, 0.0],
              [0.42364893, 0.54930614, 1.09861229],
          ],
          dtype=np.float32,
      )
  
      assert is_close(expected_outputs, v.val)
  
imports: import scipy
  from coremltools.converters.mil import testing_reqs
  from coremltools.converters.mil.testing_reqs import *
  from .testing_utils import run_compare_builder
label_desc: Use image node_id 6 for calling the TestElementwiseUnary obj's underlying member method code with example usage: obj.test_builder_atanh_eval() without return types