/**
  * Withdraws some amount of funds.
  *
  * Supported parameters include:
  *
  *  * commit (Boolean)
  */
 public function createAccountWithdrawal(Account $account, Withdrawal $withdrawal, array $params = [])
 {
     $data = $this->mapper->fromWithdrawal($withdrawal);
     $this->postAndMap($account->getResourcePath() . '/withdrawals', $data + $params, 'toWithdrawal', $withdrawal);
 }