docs: def get_pv_args(name, session=None, call=None):
      '''
      Get PV arguments for a VM
  
      .. code-block:: bash
  
          salt-cloud -a get_pv_args xenvm01
  
      '''
      if call == 'function':
          raise SaltCloudException(
              'This function must be called with -a or --action.'
          )
      if session is None:
          log.debug('New session being created')
          session = _get_session()
      vm = _get_vm(name, session=session)
      pv_args = session.xenapi.VM.get_PV_args(vm)
      if pv_args:
          return pv_args
      return None