public static @NotNull IndentInside createIndentOn(final @Nullable CharSequence lastLine) {
    final IndentInside result = new IndentInside();
    if (lastLine == null) {
      return result;
    }
    for (int i = 0; i < lastLine.length(); i++) {
      if (lastLine.charAt(i) == ' ') result.whiteSpaces += 1;
      if (lastLine.charAt(i) == '\t') result.tabs += 1;
    }
    return result;
  }
public static @NotNull IndentInside createIndentOn(final @Nullable CharSequence lastLine)