{"ast_node_type":"function","tokens":[{"end":83,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn source_root_parent_map(&self) -> FxHashMap<SourceRootId, SourceRootId> {
    /// If a `SourceRoot` doesn't have a parent and is local then it is not contained in this mapping but it can be asserted that it is a root `SourceRoot`.
        let roots = self.fsc.roots();