code: def clear():
      
      fig = _context['figure']
      if fig is not None:
          fig.marks = []
          fig.axes = []
          setattr(fig, 'axis_registry', {})
          _context['scales'] = {}
          key = _context['current_key']
          if key is not None:
              _context['scale_registry'][key] = {}
docs: Clears the current context figure of all marks axes and grid lines.