public function testIsSetAttentionRequired()
 {
     $payment = new Payment($this->getInstruction(), 123);
     $this->assertFalse($payment->isAttentionRequired());
     $payment->setAttentionRequired(true);
     $this->assertTrue($payment->isAttentionRequired());
     $payment->setAttentionRequired(false);
     $this->assertFalse($payment->isAttentionRequired());
 }