protected function setSepaSequenceTypeAttr($value = null, $isDirty = true)
    {
		$value = strtoupper($value);
        if ($value !== null && $value !== '' && !in_array($value, $this->_sepaSequenceTypes)) {
            throw new InvalidSequenceTypeException('Invalid sequence type: ' . $value);
        }

        $this->sepaSequenceType = $value;
        $this->setDirtyState($isDirty, 'sepaSequenceType');
    }