static Index getIndex(Object o) {
    if (o instanceof NotEqualConditionEvaluator) {
      return ((NotEqualConditionEvaluator) o).indxInfo._index;
    } else {
      throw new IllegalStateException(
          "The Object is not of type NotEqualConditionEvaluator");
    }
  }
Test function which retrieves the underlying Index for a NotEqualConditionEvaluator operator

@param o Object of type NotEqualConditionEvaluator from which the index needs to be retrieved
geode-core/src/main/java/org/apache/geode/cache/query/internal/RangeJunction.java