(*github.com/grafana/dskit/spanlogger.SpanLogger).Error
(github.com/go-kit/kit/log.Logger).Log
(github.com/go-kit/log.Logger).Log
(github.com/mitchellh/colorstring).Println
(github.com/opentracing/opentracing-go.Tracer).Inject
io.Copy
io/ioutil.ReadFile
io/ioutil.WriteFile
