in timebase-kafka-connector/src/main/java/deltix/kafka/connect/FieldSelection.java [20:29]
private static Set<String> toSet(String valueList) {
if (valueList == null || valueList.isEmpty())
return null;
Set<String> valueSet = new HashSet<>();
for (String value : valueList.split(",")) {
valueSet.add(value.trim());
}
return Collections.unmodifiableSet(valueSet);
}