[sigc] is it possible to disconnect without storing `sigc::connection'?

[Paul Pogonyshev <pogonyshev gmx net>]

Hi,

In C-level GTK+ there is a function named g_signal_handlers_disconnect_matched().
It can be used to disconnect, for instance, particular handlers (i.e. with
matching function) of an object.  Is something similar possible with libsigc++
or do I have to store `sigc::connection' objects around?

Paul