code: def close(key):
      
      figure_registry = _context['figure_registry']
      if key not in figure_registry:
          return
      if _context['figure'] == figure_registry[key]:
          figure()
      fig = figure_registry[key]
      if hasattr(fig, 'pyplot'):
          fig.pyplot.close()
      fig.close()
      del figure_registry[key]
      del _context['scale_registry'][key]
docs: Closes and unregister the context figure corresponding to the key.
  
      Parameters
      ----------
  
      key: hashable
          Any variable that can be used as a key for a dictionary