function _sendForReceiver(FeeReceiver memory _receiver, uint256 _vaultId, address _vault, uint256 amountToSend) internal virtual returns (bool) {
  if (_receiver.isContract) {
  ...
  } else {
    IERC20Upgradeable(_vault).safeTransfer(_receiver.receiver, amountToSend);
  }
}
function _sendForReceiver(FeeReceiver memory _receiver, uint256 _vaultId, address _vault, uint256 amountToSend) internal virtual returns (bool) {
  if (_receiver.isContract) {
  ...
  } else {
    IERC20Upgradeable(_vault).safeTransfer(_receiver.receiver, amountToSend);
    return true;
  }
}
