Need several struct declarations remain in private header

Since Qt 6.4 several struct definitions disappeared from qobject private header file:

• QObjectPrivate::Connection
• QObjectPrivate::Sender

I need these definitions remaining in the private API. QtJambi uses Sender to register the current QObject sender when emitting java-defined signals. And QtJambi needs Connection to access sender, receiver, method, signal and isSlotObject.

Is it possible to remain it in private API?