src/Fulfillment/Services/FulfillmentBaseService.php
public static function getConfigDefinitions()
    {
        $definitions = parent::getConfigDefinitions();

        return $definitions + [
            'apiVersion' => [
                'valid' => ['string'],
                'default' => \DTS\eBaySDK\Fulfillment\Services\FulfillmentService::API_VERSION,
                'required' => true
            ],
            'authorization' => [
                'valid' => ['string'],
                'required' => true
            ],
            'marketplaceId' => [
                'valid' => ['string']
            ]
        ];
    }
public static function getConfigDefinitions()
    {
        $definitions = parent::getConfigDefinitions();

        return $definitions + [
            'apiVersion' => [
                'valid' => ['string'],
                'default' => \DTS\eBaySDK\Fulfillment\Services\FulfillmentService::API_VERSION,
                'required' => true
            ],
            'authorization' => [
                'valid' => ['string'],
                'required' => true
            ],
            'marketplaceId' => [
                'valid' => ['string']
            ]
        ];
    }
Returns definitions for each configuration option that is supported.

@return array An associative array of configuration definitions.