# File lib/messenger/messenger.rb, line 525 def selectable impl = Cproton.pn_messenger_selectable(@impl) # if we don't have any selectables, then return return nil if impl.nil? fd = Cproton.pn_selectable_get_fd(impl) selectable = @selectables[fd] if selectable.nil? selectable = Selectable.new(self, impl) @selectables[fd] = selectable end return selectable end