@Override
  public String toString() {
    StringBuilder builder = new StringBuilder("CumulativeNonDistinctResults::");
    builder.append('[');
    for (final E e : this) {
      builder.append(e).append(',');
    }
    builder.deleteCharAt(builder.length() - 1);
    builder.append(']');
    return builder.toString();
  }
This is used as a wrapper over all the results of PR which are of non distinct type
geode-core/src/main/java/org/apache/geode/cache/query/internal/CumulativeNonDistinctResults.java