public function checkPhpFileExists($sClassName)
    {
        if ($this->isMetadataVersionGreaterEqual('2.0')) {
            $composerClassLoader = $this->getModuleHelper()->getAutoloader();

            return $composerClassLoader->findFile($sClassName);
        } else {
            $sExtensionPath = $sClassName . '.php';
            $res = $this->checkFileExists($sExtensionPath);
            return $res;
        }
    }