{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"//"}]}
    // Find the first non-whitespace character in `from_second_colon`.. `f`
    let mut found_a_non_whitespace_character = false;
    let after_second_colon = source_map.span_take_while(from_second_colon, |c| {