Is it possible to construct a `MyStructRef` from an owned subset of its fields?

[spherinder]

Given this struct

#[derive(borrow::Partial)]
#[module(crate::model)]
struct MyStruct {
    a: A,
    b: B,
    c: C,
}

if I have an a: A and a b: B, can I construct a p!(<a, b>MyStructRef) or a p!(<mut a, mut b>MyStructRef), even if I do not have a c: C?

== EDIT ==
I ended up doing this:

fn mk_hidden<T>() -> Hidden<T> {
    unsafe { mem::transmute(ptr::null_mut::<T>()) }
}
MyStructRef { a: &mut a, b: &mut b, c: mk_hidden::<C>() }

[wdanilo]

There is a new version of borrow, which is not released yet, which will make something like that much simpler. I will try to polish and release it this week. I'll write here after it's done.