@Override
    protected Object execute(Object[] data, State state) {
        return null; //Since the e function takes in no parameters, this method does not get called. Hence, not
        // implemented.
    }
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