{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"ref_tracking:"}]}
    ref_tracking: Option<&'rt mut RefTracking<MPlaceTy<'tcx, M::Provenance>, Vec<PathElem>>>,
    path: Vec<PathElem>,
    /// `None` indicates this is not validating for CTFE (but for runtime).