class typeAccumulator channel (meaningful for Netchannels built from Batteries output channels).['a]acc_out_channel =object..end
Once an accumulator channel has been closed, the value it has
accumulated during output can be retrieved using # accumulator.
This class can be coerced to a plain rec_out_channel using
acc_oc :> rec_out_channel, where acc_oc is an
acc_out_channel instance.
Inherits
rec_out_channelmethod accumulator : 'a optionSome acc where acc is the accumulator data collected
when the System.IO.output channel used to create this
Netchannel was closed; return None if the channel hasn't been
closed yet.