'Enables notifications for all hosts that have services that
are members of a particular servicegroup.
Note that this command does not enable notifications for
services associated with the hosts in this servicegroup.
Syntax: ENABLE_SERVICEGROUP_HOST_NOTIFICATIONS;<servicegroup_name>'

def enable_servicegroup_host_notifications(self, servicegroup):

    cmd = 'ENABLE_SERVICEGROUP_HOST_NOTIFICATIONS'
    notif_str = self._fmt_notif_str(cmd, servicegroup)
    nagios_return = self._write_command(notif_str)
    if nagios_return:
        return notif_str
    else:
        return 'Fail:    could    not    write    to    the    command    file'
