code: func NotPanics(t TestingT, f assert.PanicTestFunc, msgAndArgs ...interface{}) {
  	if h, ok := t.(tHelper); ok {
  		h.Helper()
  	}
  	if assert.NotPanics(t, f, msgAndArgs...) {
  		return
  	}
  	t.FailNow()
  }
docs: // NotPanics asserts that the code inside the specified PanicTestFunc does NOT panic.
  //
  //   assert.NotPanics(t, func(){ RemainCalm() })