for (i in 0 until 16) {
      if (prefix.exhausted()) {
        break
      }
      val codePoint = prefix.readUtf8CodePoint()
      if (Character.isISOControl(codePoint) && !Character.isWhitespace(codePoint)) {
        return false
      }
    }
    return true
  } catch (_: EOFException) {
    return false // Truncated UTF-8 sequence.
  }

        for (int i = 0; i < pattern.length(); ++i) {
            final char ch = pattern.charAt(i);
            if (Character.isLetterOrDigit(ch) || Character.isWhitespace(ch)) {
                buf.append(ch);
            }
        }
        if (buf.indexOf("yy") == -1) {
            final int pos = buf.indexOf("y");
            if (pos != -1) {

        for (int i = 0; i < pattern.length(); ++i) {
            final char ch = pattern.charAt(i);
            if (Character.isLetterOrDigit(ch) || Character.isWhitespace(ch)) {
                buf.append(ch);
            }
        }
        if (buf.indexOf("HH") == -1) {
            final int pos = buf.indexOf("H");
            if (pos != -1) {

        for (int i = 0; i < pattern.length(); ++i) {
            final char ch = pattern.charAt(i);
            if (Character.isLetterOrDigit(ch) || Character.isWhitespace(ch)) {
                buf.append(ch);
            }
        }
        if (buf.indexOf("yy") == -1) {
            final int pos = buf.indexOf("y");
            if (pos != -1) {

    public static boolean isBlank(final String str) {
        if (str == null || str.length() == 0) {
            return true;
        }
        for (int i = 0; i < str.length(); i++) {
            if (!Character.isWhitespace(str.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    /**
     * Returns true if the string is not blank.
     *
     * @param str

HSPLkotlin/sequences/SequencesKt___SequencesJvmKt;->asSequence(Ljava/util/Iterator;)Lkotlin/sequences/Sequence;
HSPLkotlin/text/CharsKt__CharKt;->checkRadix(I)I
HSPLkotlin/text/CharsKt__CharKt;->equals(CCZ)Z
HSPLkotlin/text/CharsKt__CharKt;->isWhitespace(C)Z
HSPLkotlin/text/Charsets;-><clinit>()V
HSPLkotlin/text/MatcherMatchResult$groupValues$1;-><init>(Lkotlin/text/MatcherMatchResult;)V
HSPLkotlin/text/MatcherMatchResult$groupValues$1;->get(I)Ljava/lang/Object;