Imports of package conversion

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
errorsPackage errors implements functions to manipulate errors.
github.com/golang/protobuf/jsonpbPackage jsonpb provides functionality to marshal and unmarshal between a protocol buffer message and JSON.
github.com/golang/protobuf/protoPackage proto provides functionality for handling protocol buffer messages.
github.com/golang/protobuf/ptypes/struct