{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"if"}]}
                    if first_ty == self_ty || first_ty == self.tcx.types.self_param {
                    let first_ty = first.peel_refs();
                        Some(first.ref_mutability().map_or("", |mutbl| mutbl.ref_prefix_str()))