public Iterator get(Object indexKey) {
    return new HashIndexSetIterator(indexKey, hashIndexSetProperties);
  }
Locates the index of <tt>obj</tt>.

@param indexKey an <code>Object</code> value that represents the index key
@return Iterator over a collection of objects that match the key
geode-core/src/main/java/org/apache/geode/cache/query/internal/index/HashIndexSet.java