if(testCase.testFlatBufferSerialization() == TestCase.TestSerialization.BEFORE_EXEC || testCase.testFlatBufferSerialization() == TestCase.TestSerialization.BOTH){
                serializedAfterExec = testCase.sameDiff().asFlatBuffers(true);
                Preconditions.checkNotNull(serializedAfterExec, "Serialization failed? Null output");
            }