default Map<String, MessageInfo> findAllMessageInfosForKey(StoreKey key) throws StoreException {
    MessageInfo info = findKey(key);
    Map<String, MessageInfo> result = new HashMap<>();
    result.put("0", info);
    return result;
  }
Return all the MessageInfos associated with the given key in the store. The result is a map, whose key
should be string that would indicated the internal order of each MessageInfo value, if there is any internal
order.
@param key The key of which blob to return {@link MessageInfo}.
@return A map of {@link MessageInfo} as value and an ordered key.
@throws StoreException
ambry-api/src/main/java/com/github/ambry/store/Store.java