public void UpdateAsyncWithTask_ThrowsNotSupportedException()
        {
            // Arrange
            var service = new DebitRefundService(null);

            // Act, Assert
            Assert.Throws<NotSupportedException>(() => service.UpdateAsync(null, null, null));
        } 
        public void UpdateAsyncWithTask_ThrowsNotSupportedException()
        {
            // Arrange
            var service = new DebitRefundService(null);

            // Act, Assert
            Assert.Throws <NotSupportedException>(() => service.UpdateAsync(null, null, null));
        }