class_docstr: A helper class to provide an OpenGL context. This context is global
  to the application.
class_docstr_tok: ["A","helper","class","to","provide","an","OpenGL","context",".","This","context","is","global","to","the","application","."]
code: def __del__(self):
      self.close()
  
file_path: vispy/vispy/app/backends/_offscreen_util.py
imports: from ..None import Application, Canvas
  from ...None import gloo
label_desc: Use image node_id 5 for calling the OffscreenContext obj's underlying member method code with example usage: obj.__del__() without return types