/// <summary>
 /// Returns true if a reflection ifno has an attribute of type T.
 /// </summary>
 /// <typeparam name="T"></typeparam>
 /// <param name="mem"></param>
 /// <returns></returns>
 static public bool HasAttribute <T>(this IReflectionData mem) where T : class
 {
     return(mem.GetAttribute <T>() != null);
 }