in serialization/src/main/java/com/twitter/serial/util/InternalSerialUtils.java [138:147]
public static int hashCode(@Nullable Iterable<?> iterable) {
if (iterable == null) {
return 0;
}
int hash = 1;
for (Object item : iterable) {
hash = hash * 31 + hashCode(item);
}
return hash;
}