code: public boolean
  findRRset(Name name, int type, int section) {
  	if (sections[section] == null)
  		return false;
  	for (int i = 0; i < sections[section].size(); i++) {
  		Record r = (Record) sections[section].get(i);
  		if (r.getType() == type && name.equals(r.getName()))
  			return true;
  	}
  	return false;
  }
docs: Determines if an RRset with the given name and type is already
  present in the given section.
  @see RRset
  @see Section