Method update

crates/vm/src/builtins/set.rs:355–366

(
        &self,
        others: impl core::iter::Iterator<Item = ArgIterable>,
        vm: &VirtualMachine,
    )

    }

    fn update(
        &self,
        others: impl core::iter::Iterator<Item = ArgIterable>,
        vm: &VirtualMachine,
    ) -> PyResult<()> {
        for iterable in others {
            for item in iterable.iter(vm)? {
                self.add(item?, vm)?;
            }
        }
        Ok(())
    }

    fn update_internal(&self, iterable: PyObjectRef, vm: &VirtualMachine) -> PyResult<()> {
        // check AnySet