{"ast_node_type":"variable","tokens":[{"end":117,"kind":"keyword","start":0,"text":"let"}]}
                let not_high = self.context.new_unary_op(self.location, UnaryOp::LogicalNegate, self.u64_type, high);
                let not_low = self.context.new_unary_op(self.location, UnaryOp::LogicalNegate, self.u64_type, low);