mock sets up three pools including a stablecoin pair pool and a pool with native wrapper token

src/PartyPlanner.sol

@@ -34,6 +34,8 @@ contract PartyPlanner is IPartyPlanner {
     function protocolFeeAddress() external view returns (address) { return PROTOCOL_FEE_ADDRESS; }
 
     IWETH9 private immutable WRAPPER;
+    function wrapper() external view returns (IWETH9) { return WRAPPER; }
+
     IPartyPoolDeployer private immutable NORMAL_POOL_DEPLOYER;
     IPartyPoolDeployer private immutable BALANCED_PAIR_DEPLOYER;
 

src/PartyPool.sol

@@ -291,8 +291,6 @@ contract PartyPool is PartyPoolBase, ERC20External, IPartyPool {
             uint256 feeUint
         )
     {
-        uint256 n = _tokens.length;
-
         // Estimate max net input (fee on gross rounded up, then subtract)
         (, uint256 netUintForSwap) = _computeFee(maxAmountIn, SWAP_FEE_PPM);