Function rustdoc::html::render::search_index::get_function_type_for_search

pub(crate) fn get_function_type_for_search<'tcx>(
    item: &Item,
    tcx: TyCtxt<'tcx>,
    impl_generics: Option<&(Type, Generics)>,
    cache: &Cache
) -> Option<IndexItemFunctionType>