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