{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"&&"}]}
            && let Some(call_kind) = self.tcx.fn_trait_kind_from_def_id(maybe_trait_def_id)
            // Just an easy way to check "trait_def_id == Fn/FnMut/FnOnce"
            && let Some(callee_ty) = callee_ty