src/Wuunder/Connector.php
public function setLogger($loggerClass, $loggerFunc) {

        if(empty($loggerClass)) {
            $this->helper->setLogger($loggerFunc);
        } else {
            $this->helper->setLogger(array($loggerClass, $loggerFunc));
        }
    }
public function setLogger($loggerClass, $loggerFunc) {

        if(empty($loggerClass)) {
            $this->helper->setLogger($loggerFunc);
        } else {
            $this->helper->setLogger(array($loggerClass, $loggerFunc));
        }
    }
Creates the logger functionality in Helper