{"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn is_synthetic_mir(self, def_id: impl Into<DefId>) -> bool {
    // meaningful HIR. This is currently used to skip over MIR borrowck.
        matches!(self.def_kind(def_id.into()), DefKind::SyntheticCoroutineBody)