{"ast_node_type":"variable","tokens":[{"end":80,"kind":"keyword","start":0,"text":"&&"}]}
            && let maybe_trait_def_id = self.tcx.parent(maybe_trait_item_def_id)
            && let maybe_trait_item_def_id = assoc_item.trait_item_def_id.unwrap_or(def_id)
            // Just an easy way to check "trait_def_id == Fn/FnMut/FnOnce"