code: def vrfs_get(self, subcommand='routes', route_dist=None,
                   route_family='all', format='json'):
          
          show = {
              'format': format,
          }
          if route_family in SUPPORTED_VRF_RF:
              assert route_dist is not None
              show['params'] = ['vrf', subcommand, route_dist, route_family]
          else:
              show['params'] = ['vrf', subcommand, 'all']
  
          return call('operator.show', **show)
docs: This method returns the existing vrfs.
  
          ``subcommand`` specifies one of the following.
  
          - 'routes': shows routes present for vrf
          - 'summary': shows configuration and summary of vrf
  
          ``route_dist`` specifies a route distinguisher value.
          If route_family is not 'all', this value must be specified.
  
          ``route_family`` specifies route family of the VRF.
          This parameter must be one of the following.
  
          - RF_VPN_V4  = 'ipv4'
          - RF_VPN_V6  = 'ipv6'
          - RF_L2_EVPN = 'evpn'
          - 'all' (default)
  
          ``format`` specifies the format of the response.
          This parameter must be one of the following.
  
          - 'json' (default)
          - 'cli'