This isn't an issue but a question:

I have a struct something like

#[derive(Encode, Decode)] struct Foo { .. members blah: Box<[Box<dyn T>]>, } 

my current approach is to have a 'serializing' version of this struct like:

struct DynType { type_id: u64, size: u64 } struct FooFile { .. members blah: &[DynType], blah_data: &[u8], } 

where blah's values are stored in blah_data and as bitcode-encoded values linearly written into a byte buf

Is this a reasonable approach? Is there a more efficient approach?