```\nrequire(account != Constants.RESERVE); // Reserve address is address(0)\nrequire(account != address(this));\n(\n    uint256 isNToken,\n    /* incentiveAnnualEmissionRate */,\n    /* lastInitializedTime */,\n    /* assetArrayLength */,\n    /* parameters */\n) = nTokenHandler.getNTokenContext(account);\nrequire(isNToken == 0);\n```\n