code: def check_hook_mechanism_is_intact(module):
      
      result = True
      if check_register_present(module):
          result = not result
      if check_deregister_present(module):
          result = not result
      return result
docs: Check if the hook configuration is absent or has both register AND deregister.
  
      :param module:
      :return: True if valid plugin / module.