code: def get_policies(self, vhost):
      url = C_HTTP_TEMPLATE.format(
          self.endpoint, "{}/{}".format("policies", vhost)
      )
      result = requests.get(url, auth=(self.user, self.password))
      LOGGER.debug(f"[rabbitmanager.get_policies] {result}")
      try:
          if result.status_code == 200:
              policies_names = [e["name"] for e in result.json()]
              LOGGER.debug(
                  f"[rabbitmanager.get_policies] policies_names={policies_names}"
              )
              return policies_names
          else:
              return None
      except BaseException:
          return None
  
imports: import logging
  import time
  import requests
label_desc: Use image node_id 13 for calling the RabbitManager obj's underlying member method code with example usage: obj.get_policies(vhost) and returns: policies_names, None, None