pullAll :: forall record typ.
        ( PersistField typ
        , PersistEntityBackend record ~ DB.MongoContext
        ) => EntityField record [typ] -> [typ] -> Update record
fld `pullAll` val = eachOp pull fld val
pullAll :: forall record typ.
        ( PersistField typ
        , PersistEntityBackend record ~ DB.MongoContext
        ) => EntityField record [typ] -> [typ] -> Update record
fld `pullAll` val = eachOp pull fld val
fld `pullAll` val = eachOp pull fld val