syntax_data: {"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if matches!(refutability, Irrefutable) {
context_before:             let Ok(refutability) = self.is_let_irrefutable(pat, scrut) else { return };
context_after:                 report_irrefutable_let_patterns(