//Validate the incoming set only contains values from the specified set
func validateSetValues(valid *schema.Set) schema.SchemaValidateFunc {
return func(value interface{}, field string) (ws []string, errors []error) {
if valid.Intersection(value.(*schema.Set)).Len() != value.(*schema.Set).Len() {
errors = append(errors, fmt.Errorf("%q can only contain %v", field, value.(*schema.Set).List()))
}
return
}
}