syntax_data: {"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let is_marked_insig = tcx.has_attr(adt_def.did(), sym::rustc_insignificant_dtor);
context_before:     move |adt_def: ty::AdtDef<'tcx>| {
context_after:         if is_marked_insig {