syntax_data: {"ast_node_type":"other","tokens":[{"end":22,"kind":"keyword","start":0,"text":"tcx:"}]}
source_snippet:     tcx: TyCtxt<'tcx>,
context_before: fn adt_consider_insignificant_dtor<'tcx>(
context_after: ) -> impl Fn(ty::AdtDef<'tcx>) -> Option<DtorType> {