Function build_bind_group 

pub fn build_bind_group<B: AsBindGroup, E: AsBindGroup>(
    base: &B,
    extension: &E,
    layout: &BindGroupLayout,
    render_device: &RenderDevice,
    (base_param, extended_param): &mut SystemParamItem<'_, '_, (B::Param, E::Param)>,
    force_no_bindless: bool,
    output: &mut BindGroupBuilder,
) -> Result<(), AsBindGroupError>

Combines AsBindGroup::build_bind_group implementations from base B and extension E by concatenating their bindings