# File lib/Dnsruby/name.rb, line 190
    def subdomain_of?(other)
      raise ArgumentError, "not a domain name: #{other.inspect}" unless Name === other
      return false if @absolute != other.absolute?
      other_len = other.length
      return false if @labels.length <= other_len
      return @labels[-other_len, other_len] == other.to_a
    end