code: public static final SerIterable navigableSet(final Class<?> valueType, final List<Class<?>> valueTypeTypes) {
          final NavigableSet<Object> coll = new TreeSet<>();
          return set(valueType, valueTypeTypes, coll);
      }
docs: Gets an iterable wrapper for {@code NavigableSet}.
  
  @param valueType  the value type, not null
  @param valueTypeTypes  the generic parameters of the value type
  @return the iterable, not null