public void setComplexEventPopulater(ComplexEventPopulater complexEventPopulater) {
        this.complexEventPopulater = complexEventPopulater;
    }
Defines the logic to find a matching event from an incremental aggregator (retrieval from incremental aggregator),
based on the logical conditions defined herewith.
modules/siddhi-core/src/main/java/io/siddhi/core/util/collection/operator/IncrementalAggregateCompileCondition.java