Function merge 

pub fn merge(
    file: &CreditsFile,
    audio: &AudioManifest,
    bought: &[&str],
) -> Credits

The credits the screen shows: the third-party works audio’s music cues name, then those its sound cues name (each once, by title; a work used for both counts as music), then file’s entries that aren’t hidden. Our own work (audio::OWN) isn’t listed, and a bought work only when one of bought (the build’s files from the private folder) is its: a build without the art doesn’t use it.