function handleStableToken(
        address token,
        uint256 amount,
        uint8 opCode
    ) internal {
        // Check that `token` is a whitelisted stablecoin token.
        // require(whitelistedStableTokens[token]);
        handleToken(token, amount, opCode);
    }
function redeemStable(address token, uint256 amount) external {
        // require(whitelistedAnchorStableTokens[token]);
        handleToken(token, amount, OP_CODE_REDEEM_STABLE);
    }
function lockCollateral(address token, uint256 amount) external {
        // require(whitelistedCollateralTokens[token]);
        handleToken(token, amount, OP_CODE_LOCK_COLLATERAL);
    }
