{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
    /// setting, always returning `None` if `share-generics` is off.
    /// This method already takes into account the global `-Zshare-generics`
    pub fn upstream_monomorphization(&self, tcx: TyCtxt<'tcx>) -> Option<CrateNum> {