@Override
    protected Object execute(Object data, State state) {
        //More than one attribute executors
        return null;
    }
Executor class for finding the start time and end time of the within clause in incremental processing.
This is important when retrieving incremental aggregate values by specifying a time range with 'within' clause.
modules/siddhi-core/src/main/java/io/siddhi/core/executor/incremental/IncrementalAggregateBaseTimeFunctionExecutor.java