Assigns the group for the given action to the current view.
        
        :param      action | <QAction>

def assignGroup(self, action):
        """
        Assigns the group for the given action to the current view.
        
        :param      action | <QAction>
        """
        grp  = unwrapVariant(action.data())
        view = self._currentPanel.currentView()
        view.setViewingGroup(grp)