code: def get_mxnet_activation_name(activation_name: str):
      """
      Convert coach activation name to mxnet specific activation name
      :param activation_name: name of the activation inc coach
      :return: name of the activation in mxnet
      """
      activation_functions = {
          "relu": "relu",
          "tanh": "tanh",
          "sigmoid": "sigmoid",
          # FIXME Add other activations
          # 'elu': tf.nn.elu,
          "selu": "softrelu",
          # 'leaky_relu': tf.nn.leaky_relu,
          "none": None,
      }
      assert (
          activation_name in activation_functions
      ), "Activation function must be one of the following {}. instead it was: {}".format(
          activation_functions.keys(), activation_name
      )
      return activation_functions[activation_name]
  
imports: import inspect
  from typing import Any, Dict, Generator, Iterable, List, Tuple, Union
  from types import ModuleType
  import mxnet
  from mxnet import gluon, nd
  from mxnet.ndarray import NDArray
  import numpy
  from rl_coach.core_types import GradientClippingMethod
label_desc: Use image node_id 14 for calling a global function with example usage: get_mxnet_activation_name(activation_name) and returns: activation_functions