code: @NonNull
      @Override
      public OrderBy orderBy(@NonNull Ordering... orderings) {
          if (orderings == null) {
              throw new IllegalArgumentException("orderings is null.");
          }
          return new OrderBy(this, Arrays.asList(orderings));
      }
docs: Create and chain an ORDER BY component for specifying the orderings of the query result.
  
  @param orderings an array of the ORDER BY expressions.
  @return the ORDER BY component.