/**
  * Adds VCS patterns.
  *
  * @see ignoreVCS
  *
  * @param string|string[] $pattern VCS patterns to ignore
  */
 public static function addVCSPattern($pattern)
 {
     foreach ((array) $pattern as $p) {
         self::$vcsPatterns[] = $p;
     }
     self::$vcsPatterns = array_unique(self::$vcsPatterns);
 }