/**
  * @param \Finix\Resources\Transfer $srcTxfr
  * @return \Finix\Resources\Reversal
  */
 private function reverseTransfer($srcTxfr)
 {
     return $srcTxfr->reverse(100);
 }
 public function test_reversalCreate()
 {
     $transfer_state = $this->fillSourceTransfer($this->transfer);
     $transfer = new Transfer($transfer_state);
     $transfer->save();
     $reversal = $transfer->reverse(100);
     // reversals are transfers in opp. direction, so are also async
     $this->assertEquals($reversal->state, 'PENDING');
     $this->assertStringEndsWith($transfer->id, $reversal->getParentTransferHref());
 }