process (Net::SSH::Connection::Session)

         # File lib/net/ssh/connection/session.rb, line 196
    196:     def process(wait=nil, &block)
    197:       return false unless preprocess(&block)
    198:
    199:       r = listeners.keys
    200:       w = r.select { |w2| w2.respond_to?(:pending_write?) && w2.pending_write? }
    201:       readers, writers, = Net::SSH::Compat.io_select(r, w, nil, wait)
    202:
    203:       postprocess(readers, writers)
    204:     end