syntax_data: {"ast_node_type":"import","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // We cannot use `ty_and_layout_field` to retrieve the field type, since
context_before:     ) -> Ty<'tcx> {
context_after:         // `ty_and_layout_field` erases regions in the returned type. We must