public void start(@NotNull CharSequence text, int start, int end) {
    assert 0 <= start && start <= end && end <= text.length() : "Text length: " + text.length() + ", start: " + start + ", end: " + end;
    CharacterIterator characterIterator = null;
    for (int i = start; i < end; i++) {
      if (text.charAt(i) >= COMPLEX_CHAR_START) {
        characterIterator = new CharSequenceIterator(text, start, end);
        break;
      }
    }
    doStart(text, null, characterIterator, start, end);
  }
public void start(@NotNull CharSequence text, int start, int end)