func ContainsID(a []bson.ObjectId, x bson.ObjectId) bool {
	for _, n := range a {
		if x == n {
			return true
		}
	}
	return false
}
// ContainsID tells whether arrayObjectId a contains ObjectId x
ContainsID tells whether arrayObjectId a contains ObjectId x
// ContainsID tells whether arrayObjectId a contains ObjectId x
func ContainsID(a []bson.ObjectId, x bson.ObjectId) bool {
	for _, n := range a {
		if x == n {
			return true
		}
	}
	return false
}
func ContainsID ( a [ ] bson . ObjectId , x bson . ObjectId ) bool { for _ , n := range a { if x == n { return true } } return false }
ContainsID tells whether arrayObjectId a contains ObjectId x
ContainsID tells whether arrayObjectId a contains ObjectId x