How to Derive from ShaderType when the field type is set by trait associated type?

[davids91]

In the following minimal example:

use bevy::render::render_resource::ShaderSize;
use bevy::render::render_resource::ShaderType;
pub trait TraitToUseInGPU {
    type DataContainer;
    fn data(&self) -> Self::DataContainer;
}

// #[derive(ShaderType)] //This produces a compile error
struct SharedDataWithGPU<T>
where
    T: TraitToUseInGPU,
    <T as TraitToUseInGPU>::DataContainer: ShaderSize + ShaderType,
{
    content: <T as TraitToUseInGPU>::DataContainer,
}

I'd like to set what data I can reach on the GPU through the above trait. I managed to do this(I think?) through an associated type.

The Struct SharedDataWithGPU is containing other omitted fields I removed for the sake of the example.
The compile error I am getting is "cannot define multiple where clauses on an Item";

If I were to implement ShaderType explicitly here the error may disappear but I still fail to understand why is the duplicate contraint imposed here?

Is it possible to use the derive macro in this case? And if not why not?