throw IOException("Expected a connection header but was ${connectionPreface.utf8()}")
      }
    }
  }

  @Throws(IOException::class)
  fun nextFrame(
    requireSettings: Boolean,
    handler: Handler,
  ): Boolean {
    try {
      source.require(9) // Frame header size.
    } catch (e: EOFException) {
      return false // This might be a normal socket close.
    }

  public final boolean removeIf(Predicate<? super E> filter) {
    throw new UnsupportedOperationException();
  }

  /**
   * Guaranteed to throw an exception and leave the collection unmodified.
   *
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")

                final String configIndex = values[0];
                final String configType = values[1];

                final boolean isFessIndex = DOC_INDEX.equals(configIndex);
                final String indexName;
                if (isFessIndex) {
                    final boolean exists = existsIndex(fessConfig.getIndexDocumentUpdateIndex());
                    if (!exists) {

     * @return {@literal true} if the arguments are suitable for the parameter types
     */
    protected boolean isSuitable(final Class<?>[] paramTypes, final Object[] args, final boolean adjustNumber) {
        if (args == null) {
            return paramTypes.length == 0;
        }
        if (paramTypes.length != args.length) {
            return false;

        private final String ruleId;
        private final boolean matchResult;
        private final ResponseProcessor responseProcessor;

        public TestRule(String ruleId, boolean matchResult) {
            this(ruleId, matchResult, null);
        }

        public TestRule(String ruleId, boolean matchResult, ResponseProcessor responseProcessor) {
            this.ruleId = ruleId;

  }

  static String formatCompact4Digits(double value) {
    return String.format(Locale.ROOT, "%.4g", value);
  }

  static boolean stringIsNullOrEmpty(@Nullable String string) {
    return string == null || string.isEmpty();
  }

  /**
   * Returns the string if it is not null, or an empty string otherwise.
   *

     * @return true if exceptions should be ignored, false otherwise.
     */
    public boolean isIgnoreException() {
        return ignoreException;
    }

    /**
     * Sets whether to ignore exceptions.
     * @param ignoreException true to ignore exceptions, false otherwise.
     */
    public void setIgnoreException(final boolean ignoreException) {
        this.ignoreException = ignoreException;
    }

    protected final long queryTime;

    /** Flag indicating whether the search results are partial due to timeout or other constraints. */
    protected final boolean partialResults;

    /** The facet response containing aggregated facet information for the search results. */
    protected final FacetResponse facetResponse;

    /**

    host: String,
    session: SSLSession,
  ): Boolean =
    if (!host.isAscii()) {
      false
    } else {
      try {
        verify(host, session.peerCertificates[0] as X509Certificate)
      } catch (_: SSLException) {
        false
      }
    }

  fun verify(
    host: String,
    certificate: X509Certificate,
  ): Boolean =
    when {

        if (colno >= str.length()) {
            return -1;
        }
        return str.charAt(colno++);
    }

    private void initVal() {
        sval = null;
    }

    private boolean processEOF() {
        if (peekc < 0) {
            ttype = TT_EOF;
            return true;
        }
        if (peekc == NEED_CHAR) {
            peekc = read();
            if (peekc < 0) {