public static function resumeCodeCoverage($force_start = false)
 {
     if (true === self::$coverageStopped || true === $force_start) {
         if (function_exists('xdebug_start_code_coverage')) {
             $started = xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
             self::$coverageStopped = false;
             return $started;
         }
     }
     return;
 }