def update_flowspec_vrf_table(self, flowspec_family, route_dist, rules,
                                  actions=None, is_withdraw=False):
        """Update a BGP route in the VRF table for Flow Specification.

        ``flowspec_family`` specifies one of the flowspec family name.

        ``route_dist`` specifies a route distinguisher value.

        ``rules`` specifies NLRIs of Flow Specification as
        a dictionary type value.

        `` actions`` specifies Traffic Filtering Actions of
        Flow Specification as a dictionary type value.

        If `is_withdraw` is False, which is the default, add a BGP route
        to the VRF table identified by `route_dist`.
        If `is_withdraw` is True, remove a BGP route from the VRF table.
        """
        from ryu.services.protocols.bgp.core import BgpCoreError
        from ryu.services.protocols.bgp.api.prefix import (
            FLOWSPEC_FAMILY_VPNV4,
            FLOWSPEC_FAMILY_VPNV6,
            FLOWSPEC_FAMILY_L2VPN,
        )

        if flowspec_family == FLOWSPEC_FAMILY_VPNV4:
            vrf_table = self._tables.get((route_dist, VRF_RF_IPV4_FLOWSPEC))
            prefix = FlowSpecIPv4NLRI.from_user(**rules)
            try:
                communities = create_v4flowspec_actions(actions)
            except ValueError as e:
                raise BgpCoreError(desc=str(e))
        elif flowspec_family == FLOWSPEC_FAMILY_VPNV6:
            vrf_table = self._tables.get((route_dist, VRF_RF_IPV6_FLOWSPEC))
            prefix = FlowSpecIPv6NLRI.from_user(**rules)
            try:
                communities = create_v6flowspec_actions(actions)
            except ValueError as e:
                raise BgpCoreError(desc=str(e))
        elif flowspec_family == FLOWSPEC_FAMILY_L2VPN:
            vrf_table = self._tables.get((route_dist, VRF_RF_L2VPN_FLOWSPEC))
            prefix = FlowSpecL2VPNNLRI.from_user(route_dist, **rules)
            try:
                communities = create_l2vpnflowspec_actions(actions)
            except ValueError as e:
                raise BgpCoreError(desc=str(e))
        else:
            raise BgpCoreError(
                desc='Unsupported flowspec_family %s' % flowspec_family)

        if vrf_table is None:
            raise BgpCoreError(
                desc='VRF table does not exist: route_dist=%s, '
                     'flowspec_family=%s' % (route_dist, flowspec_family))

        # We do not check if we have a path to given prefix, we issue
        # withdrawal. Hence multiple withdrawals have not side effect.
        vrf_table.insert_vrffs_path(
            nlri=prefix, communities=communities,
            is_withdraw=is_withdraw)
Update a BGP route in the VRF table for Flow Specification.

        ``flowspec_family`` specifies one of the flowspec family name.

        ``route_dist`` specifies a route distinguisher value.

        ``rules`` specifies NLRIs of Flow Specification as
        a dictionary type value.

        `` actions`` specifies Traffic Filtering Actions of
        Flow Specification as a dictionary type value.

        If `is_withdraw` is False, which is the default, add a BGP route
        to the VRF table identified by `route_dist`.
        If `is_withdraw` is True, remove a BGP route from the VRF table.