javadoc for ids

Author: dnhatn

x-pack/plugin/esql/compute/src/main/generated-src/org/elasticsearch/compute/aggregation/ValuesBytesRefAggregator.java

@@ -217,6 +217,12 @@ $endif$
      * Values are collected in a hash. Iterating over them in order (row by row) to build the output,
      * or merging with other state, can be expensive. To optimize this, we build a sorted structure once,
      * and then use it to iterate over the values in order.
+     *
+     * @param ids positions of the {@link GroupingState#values} to read.
+$if(BytesRef)$
+     *            If built from {@link GroupingState#sortedForOrdinalMerging(GroupingState)},
+     *            these are ordinals referring to the {@link GroupingState#bytes} in the target state.
+$endif$
      */
     private record Sorted(Releasable releasable, int[] counts, int[] ids) implements Releasable {
         @Override