src/ShopifyApp/Models/Plan.php
public function typeAsString($plural = false)
    {
        $type = null;
        switch ($this->type) {
            case self::PLAN_ONETIME:
                $type = 'application_charge';
                break;
            default:
            case self::PLAN_RECURRING:
                $type = 'recurring_application_charge';
                break;
        }

        return $plural ? "{$type}s" : $type;
    }
public function typeAsString($plural = false)
    {
        $type = null;
        switch ($this->type) {
            case self::PLAN_ONETIME:
                $type = 'application_charge';
                break;
            default:
            case self::PLAN_RECURRING:
                $type = 'recurring_application_charge';
                break;
        }

        return $plural ? "{$type}s" : $type;
    }
Returns the plan type as a string (for API).

@param bool $plural Return the plural form or not.

@return string