throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
} elseif (!is_object($this->getFileObject())) {
// Pointer is not a valid object!
throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
} elseif (!is_object($this->getFileObject())) {
// Pointer is not a valid object!