Imports
- github.com/cenkalti/backoff
- github.com/go-kit/kit/log
- github.com/go-kit/kit/log/level
- github.com/hako/durafmt
- github.com/pkg/errors
- github.com/prometheus/alertmanager/notify
- github.com/prometheus/alertmanager/types
- github.com/prometheus/client_golang/prometheus
- github.com/stretchr/testify/assert