{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"&&"}]}
                    && let Some(ty) = sig.decl.inputs.get(local.index() - 1)
                    && let hir::TraitItemKind::Fn(sig, _) = ti.kind
                    && let hir::TyKind::Ref(_, mut_ty) = ty.kind