Function resolve_source_path 

pub fn resolve_source_path<'a>(
    entries: impl IntoIterator<Item = (&'a str, Option<&'a str>)>,
    path: &'a str,
) -> Result<Option<String>, String>

Resolve a selector in the immutable source tree. Cycles have no resolved selector.

Errors

Returns an error for an escaping, overlong, or broken link target.