# File lib/redis/namespace.rb, line 311
    def method_missing(command, *args, &block)
      normalized_command = command.to_s.downcase

      if ADMINISTRATIVE_COMMANDS.include?(normalized_command)
        # administrative commands usage is deprecated and will be removed in 2.0
        # redis-namespace cannot safely apply a namespace to their effects.
        return super if deprecations?
        if warning?
          warn("Passing '#{normalized_command}' command to redis as is; " +
               "administrative commands cannot be effectively namespaced " +
               "and should be called on the redis connection directly; " +
               "passthrough has been deprecated and will be removed in " +
               "redis-namespace 2.0 (at #{call_site})"
               )
        end
        call_with_namespace(command, *args, &block)
      elsif COMMANDS.include?(normalized_command)
        call_with_namespace(command, *args, &block)
      elsif @redis.respond_to?(normalized_command) && !deprecations?
        # blind passthrough is deprecated and will be removed in 2.0
        # redis-namespace does not know how to handle this command.
        # Passing it to @redis as is, where redis-namespace shows
        # a warning message if @warning is set.
        if warning?
          warn("Passing '#{command}' command to redis as is; blind " +
               "passthrough has been deprecated and will be removed in " +
               "redis-namespace 2.0 (at #{call_site})")
        end
        @redis.send(command, *args, &block)
      else
        super
      end
    end