I just want to inject a custom module class A as a dependency injection for a custom service. I tried but I failed. Can any one please guide me. I'm using Drupal version 10.

Here is my code.


    class: Drupal\customb\Services\BrokerAgency
    arguments: [Twn\SoapClient\ClientBuilder]



namespace Drupal\customb\Services;

use \Twn\SoapClient\ClientBuilder;
use Symfony\Component\DependencyInjection\ContainerInterface;

class BrokerAgency implements BrokerAgencyInterface {

    protected ClientBuilder $clientBuilder;

     * @param ClientBuilder $client_builders
    public function __construct(ClientBuilder $client_builder)
        $this->clientBuilder = $client_builder;

    public static function create(ContainerInterface $container) {
        return new static(

But this is giving following error.

enter image description here

Please help me to solve this issue. Thanks in advance.

PS - Does Drupal allow this ? If no, then is there any way to achieve. this.


1 Answer 1


You need to create a service/ factory for Twn\SoapClient\ClientBuilder to create a new ClientBuilder object and use this service/ factory in your services.yml. To reference a service, you'll need to use the following notation.

    class: Drupal\customb\Services\BrokerAgency
    arguments: ['@my.client.builder']

See Services and dependency injection in Drupal 8+ for more examples and documentation.

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