Transfer using WETHGateway

transfer.sol

for(uint256 i; i<tokens.length; ++i) {
  address token = tokens[i];
  uint256 balance = balances[i];
  if (address == WETH) {
     safeTransferToken(WETH, WETHGateway, amount);
  } else {
    safeTransferToken(token, to, amount);
  }
}