impl AbsPath {
    // ...

    /// Equivalent of [`Path::to_path_buf`] for `AbsPath`.
    pub fn to_path_buf(&self) -> AbsPathBuf {
        AbsPathBuf::try_from(self.0.to_path_buf()).unwrap()
    }

    // ...
}

impl RelPath {
    // ...

    /// Equivalent of [`Path::to_path_buf`] for `RelPath`.
    pub fn to_path_buf(&self) -> RelPathBuf {
        RelPathBuf::try_from(self.0.to_path_buf()).unwrap()
    }

    // ...
}