syntax_data: {"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let def_id = body.source.def_id();
context_before:     fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
context_after:         let kind = tcx.def_kind(def_id);