Iyzipay\Model\SubMerchant::retrieve PHP Method

    public static function retrieve(RetrieveSubMerchantRequest $request, Options $options)
    {
        $rawResult = parent::httpClient()->post($options->getBaseUrl() . "/onboarding/submerchant/detail", parent::getHttpHeaders($request, $options), $request->toJsonString());
        return SubMerchantMapper::create($rawResult)->jsonDecode()->mapSubMerchant(new SubMerchant());
    }

<?php

require_once 'config.php';
# create request class
$request = new \Iyzipay\Request\RetrieveSubMerchantRequest();
$request->setLocale(\Iyzipay\Model\Locale::TR);
$request->setConversationId("123456789");
$request->setSubMerchantExternalId("AS49224");
# make request
$subMerchant = \Iyzipay\Model\SubMerchant::retrieve($request, Config::options());
# print result
print_r($subMerchant);