old_contents: from __future__ import absolute_import
  from .core import grad, primitive, jacobian
  from . import container_types
  from .convenience_wrappers import (multigrad, elementwise_grad, value_and_grad,
                                    grad_and_aux, hessian_vector_product, hessian)
  
new_contents: from __future__ import absolute_import
  from .core import grad, primitive, jacobian
  from . import container_types
  from .convenience_wrappers import (multigrad, multigrad_dict, elementwise_grad,
                                     value_and_grad, grad_and_aux, hessian_vector_product,
                                     hessian)
  
subject: add multigrad_dict to autograd/__init__.py