syntax_data: {"ast_node_type":"other","tokens":[{"end":13,"kind":"keyword","start":0,"text":"{"}]}
source_snippet:             {
context_before:                 || tcx.ensure_ok().orphan_check_impl(impl_def_id).is_ok()
context_after:                 let mut err = tcx.dcx().struct_span_err(impl_span, msg());