code: def dump(values):
      
      root = {}
      def _dump(_values, container):
          for name,value in _values._values.items():
              if isinstance(value, ValueTree):
                  container[name] = _dump(value, {})
              elif isinstance(value, list):
                  items = []
                  for item in value:
                      if not isinstance(item, str):
                          raise ValueError()
                      items.append(item)
                  container[name] = items
              elif isinstance(value, str):
                  container[name] = value
              else:
                  raise ValueError()
          return container
      return _dump(values, root)
docs: Dump a ValueTree instance, returning its dict representation.
  
      :param values:
      :type values: ValueTree
      :return:
      :rtype: dict