{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"if"}]}
                if let StatementKind::Intrinsic(box ref intrinsic) = stmt.kind
                // Simplify `assume` of a known value: either a NOP or unreachable.
                    && let NonDivergingIntrinsic::Assume(discr) = intrinsic