{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"(ConstVariableValue::Known"}]}
            (ConstVariableValue::Known { .. }, ConstVariableValue::Unknown { .. }) => Ok(value1),
            // If one side is known, prefer that one.
            (ConstVariableValue::Unknown { .. }, ConstVariableValue::Known { .. }) => Ok(value2),