code: def __init__(self, start_mark=None, end_mark=None, explicit=None):
      self.start_mark = start_mark
      self.end_mark = end_mark
      self.explicit = explicit
  
label_desc: Use image node_id 1 to create a new DocumentEndEvent object from inherited base classes: Event with example: obj = DocumentEndEvent(start_mark, end_mark, explicit)