Function search_upward 

pub(crate) fn search_upward(
    start: impl AsRef<Path>,
    end: impl AsRef<Path>,
    item: impl AsRef<Path>,
) -> Vec<PathBuf>

This function searches upward from start for directories or files matching item.

It returns a Vec<PathBuf> to all found instances in order of closest to furthest away. The function only searches up within subdirectories of end.