in src/main/java/org/apache/geode/kafka/sink/BatchRecords.java [57:65]
public void addUpdateOperation(SinkRecord record, boolean nullValuesMeansRemove) {
// it's assumed the records in are order
// if so then a previous value was in the remove list
// let's not remove it at the end of this operation
if (nullValuesMeansRemove) {
removeList.remove(record.key());
}
updateMap.put(record.key(), record.value());
}