code: def stride(self, arg):
      self.sts = [x.stride(arg) for x in self.sts]
  
imports: import unittest
  from typing import List
  from tinygrad.helpers import prod
  from tinygrad.shape.view import View
  from tinygrad.shape.shapetracker import ShapeTracker
  from tinygrad.shape.symbolic import Variable, sym_infer
label_desc: Use image node_id 7 for calling the MultiShapeTracker obj's underlying member method code with example usage: obj.stride(arg) without return types