def all
      return transmit_to_all('list-tubes', :merge => true)[:body].map do |tube_name|
        StalkClimber::Tube.new(self.pool, tube_name)
      end
    end
def all
      return transmit_to_all('list-tubes', :merge => true)[:body].map do |tube_name|
        StalkClimber::Tube.new(self.pool, tube_name)
      end
    end
:call-seq:
   all() => Array[StalkClimber::Tube]

 List of all known beanstalk tubes in the connection pool.
 Adapted with minor modification from Beaneater::Tubes#all