code: def _retrieve_device_cache(proxy=None):
      '''
      Loads the network device details if not cached already.
      '''
      global DEVICE_CACHE
      if not DEVICE_CACHE:
          if proxy and salt.utils.napalm.is_proxy(__opts__):
              # if proxy var passed and is NAPALM-type proxy minion
              if 'napalm.get_device' in proxy:
                  DEVICE_CACHE = proxy['napalm.get_device']()
          elif not proxy and salt.utils.napalm.is_minion(__opts__):
              # if proxy var not passed and is running in a straight minion
              DEVICE_CACHE = salt.utils.napalm.get_device(__opts__)
      return DEVICE_CACHf _retrieve_device_cache(proxy=None):
      '''
      Loads the network device details if not cached already.
      '''
      global DEVICE_CACHE
      if not DEVICE_CACHE:
          if proxy and salt.utils.napalm.is_proxy(__opts__):
              # if proxy var passed and is NAPALM-type proxy minion
              if 'napalm.get_device' in proxy:
                  DEVICE_CACHE = proxy['napalm.get_device']()
          elif not proxy and salt.utils.napalm.is_minion(__opts__):
              # if proxy var not passed and is running in a straight minion
              DEVICE_CACHE = salt.utils.napalm.get_device(__opts__)
      return DEVICE_CACHE
docs: Loads the network device details if not cached already.