[Kde-perl] Signal and reference

[Cervera.External at infineon.com]

Hi,

I want to send a reference on a Qt::LineEdit with a signal that I
created.
My declaration is:

signalReturnRef => ['const QLineEdit&']

But the compilator says:

Invalid type for signal argument (const QLineEdit&) 

How can I transmit a such reference?

Thanks.

Jean Baptiste