code: def dump(self, stream):
      from xml.etree.ElementTree import ElementTree
  
      if self.prettyprint:
          self.indent(self.xml)
      document = ElementTree(self.xml)
      document.write(
          stream, encoding=self.encoding, xml_declaration=True
      )
  
imports: import warnings
  from collections import defaultdict
  import networkx
  from networkx.utils import open_file
label_desc: Use image node_id 11 for calling the GraphMLWriter obj's underlying member method code with example usage: obj.dump(stream) without return types