Signals are shadowed by shiboken and not able to emit signals from wrapped classes

For custom QObject derived class and its shiboken wrapper not able receiving signals from C++ in python, the problem already mentioned here https://forum.qt.io/topic/130255/shiboken-signals-don-t-work/2.

Not sure its bug in PySide which doesn't reflect signals or shiboken which shadows the signal as plain member function. wrapping signal declarations in #ifndef BINDINGS_H makes signals working in python