docstr: A function that implements validation of the input observation space
  :param input_observation_space: the input observation space
  :return: None
docstr_tok: ["A","function","that","implements","validation","of","the","input","observation","space",":","param","input_observation_space",":","the","input","observation","space",":","return",":","None"]
code: def validate_input_observation_space(
      self, input_observation_space: ObservationSpace
  ):
      """
      A function that implements validation of the input observation space
      :param input_observation_space: the input observation space
      :return: None
      """
      pass
  
imports: from rl_coach.filters.filter import Filter
  from rl_coach.spaces import ObservationSpace
label_desc: Use image node_id 3 for calling the ObservationFilter obj's underlying member method code with example usage: obj.validate_input_observation_space(input_observation_space) without return types