{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"debug!(\"is_instantiable({:?})\","}]}
        debug!("is_instantiable({:?})", self);
    pub fn is_instantiable(&self, tcx: TyCtxt<'tcx>) -> bool {
        let (def_id, args) = match *self {