Function relative_to 

pub fn relative_to<'a>(
    root: &Path,
    path: &'a Path,
) -> Result<&'a Path, OutsideRoot>

Require path to be lexically below root and return its relative suffix.

This operation is lexical; use resolve_existing when the boundary must also hold after symbolic-link resolution.

Errors

Returns an owned diagnostic when path is not below root.