Should be. MyDecoration inherits from KDecoration2::Decoration
```C++
using namespace KDecoration2;

namespace SteelBreeze
{
class STEELBREEZETEST2_EXPORT MyDecoration : public Decoration
{
    Q_OBJECT
    //...
```
and MyDecorationButton inherits from KDecoration2::DecorationButton.
```C++
class STEELBREEZETEST2_EXPORT MyDecorationButton : public DecorationButton
{
    Q_OBJECT
    //...
```