in src/main/java/org/apache/geode/kafka/utils/EnumValidator.java [30:36]
public static <T> EnumValidator in(T[] enumerators) {
Set<String> validValues = new HashSet<>(enumerators.length);
for (T e : enumerators) {
validValues.add(e.toString().toLowerCase());
}
return new EnumValidator(validValues);
}