src/Cerberus.php
private function setNamespace($serviceName = null)
    {
        if ($serviceName === null) {
            $this->storage->getOptions()->setNamespace($this->defaultNamespace);
        } else {
            $this->storage->getOptions()->setNamespace($serviceName);
        }
    }
private function setNamespace($serviceName = null)
    {
        if ($serviceName === null) {
            $this->storage->getOptions()->setNamespace($this->defaultNamespace);
        } else {
            $this->storage->getOptions()->setNamespace($serviceName);
        }
    }
Sets the zend-cache storage namespace.

@param string $serviceName