{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"#[salsa::invoke_interned(library_symbols)]"}]}
    #[salsa::invoke_interned(library_symbols)]
    /// The symbol index for a given source root within library_roots.
    fn library_symbols(&self, source_root_id: SourceRootId) -> Arc<SymbolIndex>;