Controller/Admin/UtilsController.php
public function getModuleInstaller()
    {
        if ($this->_oModuleInstaller === null) {
            $this->_oModuleInstaller = oxNew(ModuleInstaller::class, $this->getModuleCache());
        }

        return $this->_oModuleInstaller;
    }
public function getModuleInstaller()
    {
        if ($this->_oModuleInstaller === null) {
            $this->_oModuleInstaller = oxNew(ModuleInstaller::class, $this->getModuleCache());
        }

        return $this->_oModuleInstaller;
    }
Returns initialized module installer instance

@return oxModuleInstaller