nestSet, nestInc, nestDec, nestMul :: forall record typ.
    ( PersistField typ , PersistEntityBackend record ~ DB.MongoContext)
    => NestedField record typ
    -> typ
    -> Update record
nestSet = nestedUpdateOp Assign
nestSet, nestInc, nestDec, nestMul :: forall record typ.
    ( PersistField typ , PersistEntityBackend record ~ DB.MongoContext)
    => NestedField record typ
    -> typ
    -> Update record
nestSet = nestedUpdateOp Assign
nestSet = nestedUpdateOp Assign