class output_async_mplex : ?onclose:[ `Ignore | `Write_eof ] -> ?onshutdown:onshutdown_out_spec -> ?buffer_size:int -> multiplex_controller -> async_out_channel_engine
?onclose:[ `Ignore | `Write_eof ] -> ?onshutdown:onshutdown_out_spec -> ?buffer_size:int -> multiplex_controller ->
async_out_channel_engine