docs: public String[] getTypeArr() {
  		List<String> list = new ArrayList<>();
  		From index = null;
  		for (int i = 0; i < from.size(); i++) {
  			index = from.get(i);
  			if (index.getType() != null && index.getType().trim().length() > 0) {
  				list.add(index.getType());
  			}
  		}
  		if (list.size() == 0) {
  			return null;
  		}
  
  		return list.toArray(new String[list.size()]);
  	}