code: public function reserveTransaction($transactionKey, AccessToken $accessToken)
      {
          return $this->createCommand()
              ->setAccessToken($accessToken)
              ->setRequest($this->client->put('transaction/' . $transactionKey . '/reserve'))
              ->setResponseClass('Maba\OAuthCommerceAccountsClient\Entity\Transaction')
          ;
      }
docs: @param string                                       $transactionKey
  @param \Maba\OAuthCommerceClient\Entity\AccessToken $accessToken
  
  @return Command<Transaction>