syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"place_index"}]}
source_snippet:             place_index = self.map.register_place(ty.ty, place_index, track_elem);
context_before:             ty = ty.projection_ty(self.tcx, proj);
context_after:             tracing::trace!(?proj, ?place_index, ?ty);