Function rustdoc::clean::inline::merge_attrs

fn merge_attrs(
    cx: &mut DocContext<'_>, 
    parent_module: Option<DefId>, 
    old_attrs: Attributes<'_>, 
    new_attrs: Option<Attributes<'_>>
) -> (Attributes, Option<Arc<Cfg>>)

parent_module refers to the parent of the re-export, not the original item