You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tuple.rs
    path of file: ./repos/RustPython/vm/src/builtins
    
    the code of the file until where you have to start completion: use super::{PositionIterInternal, PyGenericAlias, PyStrRef, PyType, PyTypeRef};
use crate::common::{hash::PyHash, lock::PyMutex};
use crate::object::{Traverse, TraverseFn};
use crate::{
    atomic_func,
    class::PyClassImpl,
    convert::{ToPyObject, TransmuteFromObje
    
    fn getnewargs(zelf: PyRef<Self>, vm: &VirtualMachine) -> (PyTupleRef,) {
        // the arguments to pass to tuple() is just one tuple - so we'll be doing tuple(tup), which
        // should just return tup, or tuplesubclass(tup), which'll copy/validate (e.g. for a
        // structseq)
        let tup_arg = if zelf.class().is(vm.ctx.types.tuple_type) {
            zelf
        } else {
            PyTuple::new_ref(zelf.elements.clone().into_vec(), &vm.ctx)
        };
        (tup_arg,)
    }