public static T FastGetValue <T>(this FieldInfo fieldInfo, object instance) =>
 (T)FieldAccessorCache.Get(fieldInfo).GetValue(instance);
 public static void FastSetValue(this FieldInfo fieldInfo, object instance, object value) =>
 FieldAccessorCache.Get(fieldInfo).SetValue(instance, value);
 public static object FastGetValue(this FieldInfo fieldInfo, object instance) =>
 FieldAccessorCache.Get(fieldInfo).GetValue(instance);