code: func IsType(t TestingT, expectedType interface{}, object interface{}, msgAndArgs ...interface{}) {
  	if h, ok := t.(tHelper); ok {
  		h.Helper()
  	}
  	if assert.IsType(t, expectedType, object, msgAndArgs...) {
  		return
  	}
  	t.FailNow()
  }
docs: // IsType asserts that the specified objects are of the same type.