/**
 * @dev Withdraw tokens from Definitive vault end-to-end (exit + withdraw)
 */
function withdrawFromDefinitive(
  uint8 _index,
  uint256 lpTokens
) private returns (uint256) {
  IERC20 underlying = IERC20(underlyingTokenAddresses[_index]);

  // 1. Exit from the strategy via LP Tokens
  uint256 underlyingAmount = definitiveVault.exitOne(lpTokens, 0, _index);

  // 2. Withdraw from the vault
  definitiveVault.withdraw(underlyingAmount, address(underlying));

  return underlyingAmount;
}

/**
 * @dev Transfers `amountsOut` to `recipient`, checking that they are within their accepted limits, and pays
 * accumulated protocol swap fees from the Pool.
 *
 * Returns the Pool's final balances, which are the current `balances` minus `amountsOut` and fees paid
 * (`dueProtocolFeeAmounts`).
 */
function _processExitPoolTransfers(
    address payable recipient,
    PoolBalanceChange memory change,
    bytes32[] memory balances,
    uint256[] memory amountsOut,
    uint256[] memory dueProtocolFeeAmounts
) private returns (bytes32[] memory finalBalances) {
    finalBalances = new bytes32[](balances.length);
    for (uint256 i = 0; i < change.assets.length; ++i) {
        uint256 amountOut = amountsOut[i];
        _require(amountOut >= change.limits[i], Errors.EXIT_BELOW_MIN);
        ...
    }
    ...
}