@type t() :: %Envoy.Extensions.Filters.Http.DynamicForwardProxy.V3.PerRouteConfig{
__unknown_fields__: [
{field_number :: integer(), Protobuf.Wire.Types.wire_type(),
value :: term()}
],
host_rewrite_specifier:
{:host_rewrite_literal, String.t()}
| {:host_rewrite_header, String.t()}
| nil
}