protected boolean removeAt(int index) {
    Object cur;
    HashIndexSetProperties metaData = hashIndexSetProperties;
    cur = metaData.set[index];
    if (cur == null || cur == REMOVED) {
      // nothing removed
      return false;
    } else {
      metaData.set[index] = REMOVED;
      metaData.size--;
      metaData.removedTokens++;
      hashIndexSetProperties = metaData;

      return true;
    }
  }
Remove the object at <tt>index</tt>.

@param index an <code>int</code> value
geode-core/src/main/java/org/apache/geode/cache/query/internal/index/HashIndexSet.java