syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"#[tracing::instrument(level"}]}
source_snippet:     #[tracing::instrument(level = "trace", skip(self), ret)]
context_after:     fn register_place(&mut self, ty: Ty<'tcx>, base: PlaceIndex, elem: TrackElem) -> PlaceIndex {