def print_output message, level=:debug
      return if LEVELS.index(level) > LEVELS.index(@@log_level)
      puts format_lhs("", "", ">") + message, :default
    end
def print_output message, level=:debug
      return if LEVELS.index(level) > LEVELS.index(@@log_level)
      puts format_lhs("", "", ">") + message, :default
    end
Print an IO output interaction