syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // The entire chain is made up of irrefutable `let` statements
context_before:         if chain_refutabilities.iter().all(|r| matches!(*r, Some((_, Irrefutable)))) {
context_after:             report_irrefutable_let_patterns(