syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"#[allow(rustc::diagnostic_outside_of_impl)]"}]}
source_snippet:     #[allow(rustc::diagnostic_outside_of_impl)]
context_before:     #[allow(rustc::untranslatable_diagnostic)]
context_after:     pub fn early_warn(&self, msg: impl Into<DiagMessage>) {