Since commit 5f542f3cca13f2da58b82aee2efbaffefeee00a7 Qt container-derived classes, such as
now can not be streamed to/from QDBusArgument.
error: no match for 'operator>>' (operand types are 'QDBusArgument' and 'UIntList')
If T isn't a type derived from one of Qt's container classes, the operator<< and operator>> streaming operators between T and QDBusArgument must be already declared.
Thus, the change seems to contradict with the documentation and breaks various projects, e.g. TelepathyQt: https://bugs.freedesktop.org/show_bug.cgi?id=95376