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:     let mut diag = early_dcx.early_struct_fatal(format!("unknown print request: `{req}`"));
context_after:     diag.help(format!("valid print requests are: {prints}"));