code: func IsTypef(t TestingT, expectedType interface{}, object interface{}, msg string, args ...interface{}) bool {
  	if h, ok := t.(tHelper); ok {
  		h.Helper()
  	}
  	return IsType(t, expectedType, object, append([]interface{}{msg}, args...)...)
  }
docs: // IsTypef asserts that the specified objects are of the same type.