Piwik\API\Proxy::includeApiFile PHP Method

    private function includeApiFile($fileName)
    {
        $module = self::getModuleNameFromClassName($fileName);
        $path = PIWIK_INCLUDE_PATH . '/plugins/' . $module . '/API.php';
        if (is_readable($path)) {
            require_once $path;
            // prefixed by PIWIK_INCLUDE_PATH
        } else {
            throw new Exception("API module {$module} not found.");
        }
    }