Behat\Testwork\Call\ServiceContainer\CallExtension::processCallHandlers PHP Method

    protected function processCallHandlers(ContainerBuilder $container)
    {
        $references = $this->processor->findAndSortTaggedServices($container, CallExtension::CALL_HANDLER_TAG);
        $definition = $container->getDefinition(CallExtension::CALL_CENTER_ID);
        foreach ($references as $reference) {
            $definition->addMethodCall('registerCallHandler', array($reference));
        }
    }