@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    super.toData(out);
    DataSerializer.writeInteger(originatingDSId, out);
    if (receipientDSIds != null) {
      out.writeInt(receipientDSIds.size());
      for (Integer gateway : receipientDSIds) {
        out.writeInt(gateway);
      }
    } else {
      out.writeInt(0);
    }
  }
Initialize the original set of recipient <code>Gateway</code>s.

@param originalGatewaysReceivers The original recipient <code>Gateway</code>s.
geode-core/src/main/java/org/apache/geode/internal/cache/wan/GatewaySenderEventCallbackArgument.java