implements::getFieldValueMaximumLength

public function getFieldValueMaximumLength(string $fieldName): ?int
{
	static $maximumFieldLengths = [
		self::FIELD_NAME => 160,
		self::FIELD_PERSONAL_ACCOUNT => 20,
		self::FIELD_BANK_NAME => 120,
		self::FIELD_BIC => 9,
		self::FIELD_CORRESPONDENT_ACCOUNT => 20,
	];

	return $maximumFieldLengths[$fieldName] ?? null;
}