func NewContactGroup() *ContactGroup {
	return &ContactGroup{
		Escalations: make([]*ContactGroupEscalation, config.NumSeverityLevels),
		Reminders:   make([]uint, config.NumSeverityLevels),
		Contacts: ContactGroupContacts{
			External: []ContactGroupContactsExternal{},
			Users:    []ContactGroupContactsUser{},
		},
	}
}
func NewContactGroup() *ContactGroup {
	return &ContactGroup{
		Escalations: make([]*ContactGroupEscalation, config.NumSeverityLevels),
		Reminders:   make([]uint, config.NumSeverityLevels),
		Contacts: ContactGroupContacts{
			External: []ContactGroupContactsExternal{},
			Users:    []ContactGroupContactsUser{},
		},
	}
}
// NewContactGroup returns a ContactGroup (with defaults, if applicable)