Imports
- github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3
- github.com/envoyproxy/go-control-plane/envoy/config/core/v3
- github.com/envoyproxy/go-control-plane/envoy/config/endpoint/v3
- github.com/envoyproxy/go-control-plane/envoy/config/listener/v3
- github.com/envoyproxy/go-control-plane/envoy/config/route/v3
- github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/tcp_proxy/v3
- github.com/golang/protobuf/ptypes/duration