syntax_data: {"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // If at least one of the operands is a `let ... = ...`.
context_before:                 let Ok(()) = self.visit_land(ex, &mut chain_refutabilities) else { return };
context_after:                 if chain_refutabilities.iter().any(|x| x.is_some()) {