code: def test_choice() -> None:
      lg = mutation.LocalGaussian(axes=1, size=2)
      jump = mutation.Jumping(axis=0, size=2)
      roll = mutation.Translation(0)
      Mut = mutation.MutationChoice([lg, jump, roll])
      x = Mut(Array(init=4.0 * np.ones((2, 4))))
      x.copy().mutate()
  
file_path: nevergrad/nevergrad/parametrization/test_mutation.py
imports: import typing
  import numpy
  from nevergrad.common import testing
  from .None import mutation
  from .data import Array
label_desc: Use image node_id 5 for calling a global function with example usage: test_choice() without return types