{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"signature.extend(fn_abi.args.iter().map(|arg|"}]}
                signature.extend(fn_abi.args.iter().map(|arg| {
                // already inaccurate due to ABI adjustments (see #42800).
                    let t = arg.layout.ty;