{"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"xs.into_iter().flat_map(f).collect()"}]}
    xs.into_iter().flat_map(f).collect()
fn write_vec<T, F: Fn(T) -> [u32; N], const N: usize>(xs: Vec<T>, f: F) -> Vec<u32> {
}