@Override
  public int getSizeEstimate(Object key, int op, int matchLevel) throws TypeMismatchException {
    Object[] mapKeyAndVal = (Object[]) key;
    Object mapKey = mapKeyAndVal[1];
    AbstractIndex ri = mapKeyToValueIndex.get(mapKey);
    if (ri != null) {
      return ri.getSizeEstimate(mapKeyAndVal[0], op, matchLevel);
    } else {
      return 0;
    }
  }
Return the total number of times this index has been updated
geode-core/src/main/java/org/apache/geode/cache/query/internal/index/AbstractMapIndex.java