public static BT <NB <T1>, NB <T2>, NB <T3> > NativeEntitiesBuffer <T1, T2, T3>(this EntitiesDB db, ExclusiveGroupStruct @group)
     where T1 : unmanaged, IEntityComponent
     where T2 : unmanaged, IEntityComponent
     where T3 : unmanaged, IEntityComponent
 {
     return(db.QueryEntities <T1, T2, T3>(group).ToNativeBuffers <T1, T2, T3>());
 }
 public static NB <T> NativeEntitiesBuffer <T>(this EntitiesDB db, ExclusiveGroupStruct @group)
     where T : unmanaged, IEntityComponent
 {
     return(db.QueryEntities <T>(group).ToNativeBuffer <T>());
 }