@Override
              public boolean executeWith(Object a, int b) {
                HeapDataOutputStream chunk = (HeapDataOutputStream) a;
                last = b > 0;
                try {
                  boolean okay = sendChunk(recipient, processorId, bucketId, dm, chunk, seriesNum,
                      msgNum++, numSeries, last, rvv != null);
                  return okay;
                } catch (CancelException e) {
                  return false;
                }
              }
@param a byte[] chunk
@param b positive if last chunk
@return true to continue to next chunk
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/FetchEntriesMessage.java