public function add(ProcessWrapper $processWrapper): void
    {
        $className = $processWrapper->getClassName();
        if (isset($this->processes[$className])) {
            throw new \InvalidArgumentException(
                sprintf(
                    'Testcase with name "%s" was already added, make sure you don\'t have duplicate class names.',
                    $className
                )
            );
        }

        $this->processes[$className] = $processWrapper;

        $this->graph->createVertex($className);

        if ($this->publisher) {
            $this->publisher->publishResults($className, ProcessWrapper::PROCESS_STATUS_QUEUED, null);
        }
    }