Make cancellable an optional parameter in many methods
Make cancellable an optional parameter in many methods

choeger/pygobject-cmake,choeger/pygobject-cmake,Distrotech/pygobject,davibe/pygobject,jdahlin/pygobject,MathieuDuponchelle/pygobject,davibe/pygobject,thiblahute/pygobject,pexip/pygobject,alexef/pygobject,MathieuDuponchelle/pygobject,MathieuDuponchelle/pygobject,sfeltman/pygobject,GNOME/pygobject,choeger/pygobject-cmake,nzjrs/pygobject,sfeltman/pygobject,thiblahute/pygobject,davidmalcolm/pygobject,davidmalcolm/pygobject,Distrotech/pygobject,nzjrs/pygobject,Distrotech/pygobject,alexef/pygobject,pexip/pygobject,Distrotech/pygobject,davibe/pygobject,jdahlin/pygobject,davidmalcolm/pygobject,alexef/pygobject,jdahlin/pygobject,GNOME/pygobject,davibe/pygobject,pexip/pygobject,nzjrs/pygobject,GNOME/pygobject,sfeltman/pygobject,thiblahute/pygobject