@type t() :: %Envoy.Extensions.Filters.Udp.UdpProxy.V3.UdpProxyConfig.HashPolicy{
__unknown_fields__: [
{field_number :: integer(), Protobuf.Wire.Types.wire_type(),
value :: term()}
],
policy_specifier: {:source_ip, boolean()} | {:key, String.t()} | nil
}