code: public static boolean
  supportedType(int type) {
  	Type.check(type);
  	return (type == Type.PTR || type == Type.CNAME || type == Type.DNAME ||
  		type == Type.A || type == Type.AAAA || type == Type.NS);
  }
docs: Indicates whether generation is supported for this type.
  @throws InvalidTypeException The type is out of range.