new_contents: from jnius import autoclass
  
  def get_python_list(scala_list):
      """Return list from elements of scala.collection.immutable.List"""
      python_list = []
      for i in range(scala_list.length()):
          python_list.append(scala_list.apply(i))
      return python_list
  
  
  def get_python_dict(scala_map):
      """Return a dict from entries in a scala.collection.immutable.Map"""
      python_dict = {}
      keys = get_python_list(scala_map.keys().toList())
      for key in keys:
          python_dict[key] = scala_map.apply(key)
      return python_dict
  
  
  def get_python_json(scala_json):
      """Return a JSON dict from a org.json4s.JsonAST"""
      def convert_node(node):
          if node.__class__.__name__ == 'org.json4s.JsonAST$JValue':
              values_raw = get_python_dict(node.values())
              values = {}
              for k, v in values_raw.items():
                  values[k] = convert_node(v)
              return values
              '''
              entries = []
              children = get_python_list(node.children())
              for child in children:
                  entries.append(convert_node(child))
              return entries
              '''
          elif node.__class__.__name__ == 'org.json4s.JsonAST$JObject':
              values_raw = get_python_dict(node.values())
              values = {}
              for k, v in values_raw.items():
                  values[k] = convert_node(v)
              return values
          elif node.__class__.__name__ == 'org.json4s.JsonAST$JArray':
              entries_raw = get_python_list(node.values())
              entries = []
              for entry in entries_raw:
                  entries.append(convert_node(entry))
              return entries
          elif node.__class__.__name__.startswith('scala.collection.immutable.Map') or \
              node.__class__.__name__ == 'scala.collection.immutable.HashMap$HashTrieMap':
              values_raw = get_python_dict(node)
              values = {}
              for k, v in values_raw.items():
                  values[k] = convert_node(v)
              return values
          elif node.__class__.__name__ == 'scala.collection.immutable.$colon$colon':
              entries_raw = get_python_list(node)
              entries = []
              for entry in entries_raw:
                  entries.append(convert_node(entry))
              return entries
          elif node.__class__.__name__ == 'scala.math.BigInt':
              return node.intValue()
          elif node.__class__.__name__ == 'scala.None$':
              return None
          elif node.__class__.__name__ == 'scala.collection.immutable.Nil$':
              return []
          elif isinstance(node, (str, int, float)):
              return node
          else:
              print(node.__class__.__name__)
              return node.__class__.__name__
  
      python_json = convert_node(scala_json)
      return python_json
  
  
subject: Add some Scala/Python conversion utilities