Plum\Plum\WorkflowTest::addConverterConvertsCallbackIntoCallbackConverter PHP Метод

    public function addConverterConvertsCallbackIntoCallbackConverter()
    {
        $this->workflow->addConverter(function ($item) {
            return $item;
        });
        $this->assertInstanceOf('Plum\\Plum\\Converter\\ConverterInterface', $this->workflow->getConverters()[0]->getConverter());
    }