How to change the texture of a body after the body is created in matter js?

Question

I have added a body called testObj to the world like this

const testObj = Bodies.rectangle(200,200,40,40,)

World.add(engine.current.world, [
  Bodies.rectangle(cw/2, 0, cw, 20, { isStatic: true }),
  Bodies.rectangle(cw/2, ch, cw, 20, { isStatic: true }),
  Bodies.rectangle(0, ch/2 , 20, ch, { isStatic: true }),
  Bodies.rectangle(cw, ch/2 , 20, ch, { isStatic: true }),
  testObj,])

and I have a button like this

<Button onClick={changeTexture}>change</Button>

so when I click this button I want to change the texture of testObj to a image.

( p.s- I am building this website with React if that matters. I'm using useEffect hook to render stuff.)