Function clippy_utils::is_path_lang_item

pub fn is_path_lang_item<'tcx>(
    cx: &LateContext<'_>,
    maybe_path: &impl MaybePath<'tcx>,
    lang_item: LangItem
) -> bool

If maybe_path is a path node which resolves to an item, resolves it to a DefId and checks if it matches the given lang item.