public Task <string> UpsertTestCentreRequestAsync(TestCentre testCentre)
        {
            var upsertTestCentreFunction = new UpsertTestCentreFunction();

            upsertTestCentreFunction.TestCentre = testCentre;

            return(ContractHandler.SendRequestAsync(upsertTestCentreFunction));
        }
        public Task <TransactionReceipt> UpsertTestCentreRequestAndWaitForReceiptAsync(TestCentre testCentre, CancellationTokenSource cancellationToken = null)
        {
            var upsertTestCentreFunction = new UpsertTestCentreFunction();

            upsertTestCentreFunction.TestCentre = testCentre;

            return(ContractHandler.SendRequestAndWaitForReceiptAsync(upsertTestCentreFunction, cancellationToken));
        }