provider/inmemory.go
func NewInMemoryProvider(opts ...InMemoryOption) *InMemoryProvider {
	im := &InMemoryProvider{
		filter:         &filter{},
		OnApplyChanges: func(changes *plan.Changes) {},
		OnRecords:      func() {},
		domain:         NewDomainFilter([]string{""}),
		client:         newInMemoryClient(),
	}

	for _, opt := range opts {
		opt(im)
	}

	return im
}
func NewInMemoryProvider(opts ...InMemoryOption) *InMemoryProvider {
	im := &InMemoryProvider{
		filter:         &filter{},
		OnApplyChanges: func(changes *plan.Changes) {},
		OnRecords:      func() {},
		domain:         NewDomainFilter([]string{""}),
		client:         newInMemoryClient(),
	}

	for _, opt := range opts {
		opt(im)
	}

	return im
}
// NewInMemoryProvider returns InMemoryProvider DNS provider interface implementation