code: def inverse_symlog(y: "tf.Tensor") -> "tf.Tensor":
      """Inverse of the `symlog` function as desribed in [1]:
  
      [1] Mastering Diverse Domains through World Models - 2023
      D. Hafner, J. Pasukonis, J. Ba, T. Lillicrap
      https://arxiv.org/pdf/2301.04104v1.pdf
      """
      # To get to symlog inverse, we solve the symlog equation for x:
      #     y = sign(x) * log(|x| + 1)
      # <=> y / sign(x) = log(|x| + 1)
      # <=> y =  log( x + 1) V x >= 0
      #    -y =  log(-x + 1) V x <  0
      # <=> exp(y)  =  x + 1  V x >= 0
      #     exp(-y) = -x + 1  V x <  0
      # <=> exp(y)  - 1 =  x   V x >= 0
      #     exp(-y) - 1 = -x   V x <  0
      # <=>  exp(y)  - 1 = x   V x >= 0 (if x >= 0, then y must also be >= 0)
      #     -exp(-y) - 1 = x   V x <  0 (if x < 0, then y must also be < 0)
      # <=> sign(y) * (exp(|y|) - 1) = x
      return tf.math.sign(y) * (tf.math.exp(tf.math.abs(y)) - 1)
  
imports: import logging
  from typing import Any, Callable, List, Optional, Type, TYPE_CHECKING, Union
  import gymnasium
  import numpy
  import tree
  from gymnasium.spaces import Discrete, MultiDiscrete
  from ray.rllib.utils.annotations import PublicAPI, DeveloperAPI
  from ray.rllib.utils.framework import try_import_tf
  from ray.rllib.utils.spaces.space_utils import get_base_struct_from_space
  from ray.rllib.utils.typing import LocalOptimizer, ModelGradients, PartialAlgorithmConfigDict, SpaceStruct, TensorStructType, TensorType
label_desc: Use image node_id 15 for calling a global function with example usage: inverse_symlog(y) and returns: unknown