syntax_data: {"ast_node_type":"other","tokens":[{"end":9,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:         {
context_before:             && let AggregateKind::Adt(_, _, ref mut args, _, _) = **kind
context_after:             *args = self.tcx.mk_args(&[self.tcx.types.unit.into()]);