Implement .write() on Store/ArcStore

[gbj]

No description provided.

[brofrain]

@gbj
I was trying to implement this via brainlessly copy-pasting code from Subfield. It worked well for Field, but ArcStore and Store don't seem to trigger effects.

impl<T> Writeable for ArcStore<T>
where
    T: 'static,
{
    type Value = T;

    fn try_write(&self) -> Option<impl UntrackableGuard<Target = Self::Value>> {
        self.writer()
    }

    fn try_write_untracked(
        &self,
    ) -> Option<impl DerefMut<Target = Self::Value>> {
        self.writer().map(|mut writer| {
            writer.untrack();
            writer
        })
    }
}

I haven't been able to pinpoint where the problem lies exactly, but I suspect that self.writer() being untracked isn't the intended behavior?
I need a little help with this 🙂