Storing references/lifetimes in preview2 tables

What's the proper way to store references from one value to another in tables?

Consider the following code, how can I store both the parent and child in a table? Could that be done without unsafe code?

```rust
struct Parent {
val: bool
}

impl Parent {
pub fn get_child<'a>(&'a self) -> Child<'a> {
Child {
val: &self.val
}
}
}

struct Child<'a> {
val: &'a bool,
}

fn main() {
let mut table = wasmtime_wasi::preview2::Table::new();

let parent = Parent {
val: true,
};
let child = parent.get_child();

let parent = table.push(parent).unwrap();

// can this be done somehow?
table.push_child(child, &parent);
}
```