gossip_beh: refine signature of notify_change
gossip_beh: refine signature of notify_change
seyyed/scalaris,tectronics/scalaris,digshock/scalaris,tectronics/scalaris,digshock/scalaris,seyyed/scalaris,seyyed/scalaris,seyyed/scalaris,digshock/scalaris,digshock/scalaris,seyyed/scalaris,tectronics/scalaris,tectronics/scalaris,seyyed/scalaris,seyyed/scalaris,tectronics/scalaris,digshock/scalaris,tectronics/scalaris,digshock/scalaris,tectronics/scalaris,digshock/scalaris