Function profile_for 

pub fn profile_for(
    name: &str,
    version: &str,
    config_options: &Value,
    modes: &Value,
) -> Option<&'static ModeProfile>

The profile for the agent that named itself so: its recording at exactly this version, or a recording of another version whose values the live set-up answer offers exactly — the same vocabulary, so the same reading. None is unprofiled: nothing is asked for.