private static void appendInterestResponseKeys(final @NotNull LocalRegion region,
      final @NotNull Object riKey,
      final @NotNull Collection<Object> entryKeys, final @NotNull List<Object> collector,
      final @NotNull ServerConnection servConn)
      throws IOException {
    for (final Object entryKey : entryKeys) {
      appendInterestResponseKey(region, riKey, entryKey, collector, servConn);
    }
  }
Append an interest response

@param region the region (for debugging)
@param riKey the registerInterest "key" (what the client is interested in)
@param entryKey key we're responding to
@param list list to append to
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/BaseCommand.java