class_docstr: Return a blank instance of the parent and add as subgraph on exit.
class_docstr_tok: ["Return","a","blank","instance","of","the","parent","and","add","as","subgraph","on","exit","."]
code: def __exit__(self, type_, value, traceback):
      if type_ is None:
          self.parent.subgraph(self.graph)
  
imports: from .None import backend
  from .None import files
  from .None import lang
label_desc: Use image node_id 3 for calling the SubgraphContext obj's underlying member method code with example usage: obj.__exit__(type_, value, traceback) without return types