def method_missing(name, *args, &block)
      if name.to_s[-1] == '='
        config[name[0..-2].to_s.upcase] = args[0]
      else
        config.fetch(name.to_s.upcase) {nil}
      end
    end
def method_missing(name, *args, &block)
      if name.to_s[-1] == '='
        config[name[0..-2].to_s.upcase] = args[0]
      else
        config.fetch(name.to_s.upcase) {nil}
      end
    end
Public: ensure that any configuration options are automatically exposed.