syntax_data: {"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"#[track_caller]"}]}
source_snippet:     #[track_caller]
context_before: impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for FeatureGateError {
context_after:     fn into_diag(self, dcx: DiagCtxtHandle<'a>, level: Level) -> Diag<'a, G> {