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