# File lib/net/ssh/connection/session.rb, line 196
    def process(wait=nil, &block)
      return false unless preprocess(&block)

      r = listeners.keys
      w = r.select { |w2| w2.respond_to?(:pending_write?) && w2.pending_write? }
      readers, writers, = Net::SSH::Compat.io_select(r, w, nil, wait)

      postprocess(readers, writers)
    end