syntax_data: {"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:         } else if let Some(suggestion) = SuggestUpgradeCompiler::new() {
context_before:             err.subdiagnostic(SuggestUpgradeCompiler::ui_testing());
context_after:             err.subdiagnostic(suggestion);