public CharBlockArray append(CharSequence chars, int start, int length) {int end = start + length;for (int i = start; i < end; i++) {append(chars.charAt(i));}return this;}

public virtual CharBlockArray Append(ICharSequence chars, int start, int length){int end = start + length;for (int i = start; i < end; i++){Append(chars[i]);}return this;}
