protected static Short getSizeCode(String value) {
        if ((value == null) || value.isEmpty()) {
            return null;
        }
        if (value.length() > 1) {
            return null;
        }
        return (short) value.getBytes()[0];
    }
checks if ByteOffset from S7Tag is in valid range

@param byteOffset given byteOffset
@return given byteOffset if Ok, throws PlcInvalidTagException otherwise
plc4j/drivers/s7/src/main/java/org/apache/plc4x/java/s7/readwrite/tag/S7Tag.java