code: def method_missing(name, *args, &block)
        # Restrict time zone related functions from being passed to internal ruby
        # Time attribute, since AdManagerDateTime handles timezones its own way.
        restricted_functions = [:dst?, :getgm, :getlocal, :getutc, :gmt,
            :gmtime, :gmtoff, :isdst, :localtime, :utc]
        if restricted_functions.include? name
          raise NoMethodError, 'undefined method %s for %s' % [name, self]
        end
        result = @time.send(name, *args, &block)
        if result.is_a? Time
          return self.class.new(@api, result, @timezone.identifier)
        else
          return result
        end
      end
docs: When an unrecognized method is applied to AdManagerDateTime, pass it
   through to the internal ruby Time.