{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"buf.iter().position(|ch|"}]}
    buf.iter().position(|ch| *ch == b'\n').map_or((buf, &[]), |pos| buf.split_at(pos))
fn parse_to_newline(buf: &[u8]) -> (&[u8], &[u8]) {
}