code: String
  rrToString() {
  	StringBuffer sb = new StringBuffer();
  	sb.append (Type.string(covered));
  	sb.append (" ");
  	sb.append (alg);
  	sb.append (" ");
  	sb.append (labels);
  	sb.append (" ");
  	sb.append (origttl);
  	sb.append (" ");
  	if (Options.check("multiline"))
  		sb.append ("(\n\t");
  	sb.append (FormattedTime.format(expire));
  	sb.append (" ");
  	sb.append (FormattedTime.format(timeSigned));
  	sb.append (" ");
  	sb.append (footprint);
  	sb.append (" ");
  	sb.append (signer);
  	if (Options.check("multiline")) {
  		sb.append("\n");
  		sb.append(base64.formatString(signature, 64, "\t",
  					      true));
  	} else {
  		sb.append (" ");
  		sb.append(base64.toString(signature));
  	}
  	return sb.toString();
  }
docs: Converts the RRSIG/SIG Record to a String