docs: private Query.Builder createScatterQuery(Query query, int numSplits) {
      // TODO(pcostello): We can potentially support better splits with equality filters in our query
      // if there exists a composite index on property, __scatter__, __key__. Until an API for
      // metadata exists, this isn't possible. Note that ancestor and inequality queries fall into
      // the same category.
      Query.Builder scatterPointQuery = Query.newBuilder();
      scatterPointQuery.addAllKind(query.getKindList());
      scatterPointQuery.addOrder(DatastoreHelper.makeOrder(
          DatastoreHelper.SCATTER_PROPERTY_NAME, Direction.ASCENDING));
      // There is a split containing entities before and after each scatter entity:
      // ||---*------*------*------*------*------*------*---||  = scatter entity
      // If we represent each split as a region before a scatter entity, there is an extra region
      // following the last scatter point. Thus, we do not need the scatter entities for the last
      // region.
      scatterPointQuery.getLimitBuilder().setValue((numSplits - 1) * KEYS_PER_SPLIT);
      scatterPointQuery.addProjection(Projection.newBuilder().setProperty(
          PropertyReference.newBuilder().setName("__key__")));
      return scatterPointQuery;
    }