```\nfunction \_updateInterest() internal virtual override {\n    InterestLocalVars memory \_vars;\n    \_vars.currentCash = \_getCurrentCash();\n    \_vars.totalBorrows = totalBorrows;\n    \_vars.totalReserves = totalReserves;\n\n    // Gets the current borrow interest rate.\n    \_vars.borrowRate = interestRateModel.getBorrowRate(\n        \_vars.currentCash,\n        \_vars.totalBorrows,\n        \_vars.totalReserves\n    );\n    require(\n        \_vars.borrowRate <= maxBorrowRate,\n        "\_updateInterest: Borrow rate is too high!"\n    );\n```\n