12 clientInvoke(*
this, &
ipc::capnp::messages::Echo::Client::echoRequest, MakeClientParam<Accessor<echo_fields::Context, FIELD_IN | FIELD_BOXED>>(), MakeClientParam<Accessor<echo_fields::Echo, FIELD_IN | FIELD_BOXED>>(
echo), MakeClientParam<Accessor<echo_fields::Result, FIELD_OUT | FIELD_BOXED>>(result));