docs: static String sqlToRegexSimilar(
  		String sqlPattern,
  		CharSequence escapeStr) {
  		final char escapeChar;
  		if (escapeStr != null) {
  			if (escapeStr.length() != 1) {
  				throw invalidEscapeCharacter(escapeStr.toString());
  			}
  			escapeChar = escapeStr.charAt(0);
  		} else {
  			escapeChar = 0;
  		}
  		return sqlToRegexSimilar(sqlPattern, escapeChar);
  	}