@Override
    protected StateFactory init(ExpressionExecutor[] attributeExpressionExecutors,
                                ConfigReader configReader, SiddhiQueryContext siddhiQueryContext) {
        //Nothing to be done.
        return null;
    }
Executor class for UUID function. Function execution logic is implemented in execute here.
modules/siddhi-core/src/main/java/io/siddhi/core/executor/function/UUIDFunctionExecutor.java