code: func NotPanicsf(t TestingT, f assert.PanicTestFunc, msg string, args ...interface{}) {
  	if h, ok := t.(tHelper); ok {
  		h.Helper()
  	}
  	if assert.NotPanicsf(t, f, msg, args...) {
  		return
  	}
  	t.FailNow()
  }
docs: // NotPanicsf asserts that the code inside the specified PanicTestFunc does NOT panic.
  //
  //   assert.NotPanicsf(t, func(){ RemainCalm() }, "error message %s", "formatted")