{"ast_node_type":"function","tokens":[{"end":84,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn upstream_monomorphization(&self, tcx: TyCtxt<'tcx>) -> Option<CrateNum> {
    /// setting, always returning `None` if `share-generics` is off.
        // If this is an item that is defined in the local crate, no upstream