code: def dump(self, stream=None):
      self._graphml.__exit__(None, None, None)
      self._xml_base.__exit__(None, None, None)
  
imports: import warnings
  from collections import defaultdict
  import networkx
  from networkx.utils import open_file
label_desc: Use image node_id 5 for calling the GraphMLWriterLxml obj's underlying member method code with example usage: obj.dump(stream) without return types