grpc-gcp-benchmarks/src/benchmarkTest/java/SpannerClientV1TestCases.java [110:120]:
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    long start = System.currentTimeMillis();

    // Clean the existing data.
    BeginTransactionRequest request =
        BeginTransactionRequest.newBuilder()
            .setSession(session.getName())
            .setOptions(
                TransactionOptions.newBuilder()
                    .setReadWrite(TransactionOptions.ReadWrite.getDefaultInstance())
                    .build())
            .build();
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grpc-gcp-benchmarks/src/benchmarkTest/java/SpannerTestCases.java [146:155]:
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    long start = System.currentTimeMillis();
    // Clean the data in the table.
    BeginTransactionRequest request =
        BeginTransactionRequest.newBuilder()
            .setSession(session.getName())
            .setOptions(
                TransactionOptions.newBuilder()
                    .setReadWrite(TransactionOptions.ReadWrite.getDefaultInstance())
                    .build())
            .build();
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