#vulnerable code 
                              public static String get(Type type, Annotation[] annotations, Object subject) {
    Annotation qualifier = null;
    for (Annotation a : annotations) {
      if (!IS_QUALIFIER_ANNOTATION.get(a.annotationType())) {
        continue;
      }
      if (qualifier != null) {
        throw new IllegalArgumentException("Too many qualifier annotations on " + subject);
      }
      qualifier = a;
    }
    return get(type, qualifier);
  } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                              public static String get(Type type, Annotation[] annotations, Object subject) {
    return get(type, extractQualifier(annotations, subject));
  }