lib/Model/FlowAttributes.php
public function getTypeAllowableValues()
    {
        return [
            self::TYPE_SEQUENTIAL,
            self::TYPE_EVALUATE,
            self::TYPE_SELECT,
            self::TYPE_PARALLEL,
            self::TYPE_PARALLEL_BY_EVALUATION,
            self::TYPE_SEC_JOIN,
            self::TYPE_DISCRIMINATOR,
        ];
    }
public function getTypeAllowableValues()
    {
        return [
            self::TYPE_SEQUENTIAL,
            self::TYPE_EVALUATE,
            self::TYPE_SELECT,
            self::TYPE_PARALLEL,
            self::TYPE_PARALLEL_BY_EVALUATION,
            self::TYPE_SEC_JOIN,
            self::TYPE_DISCRIMINATOR,
        ];
    }
Gets allowable values of the enum
@return string[]