Imports github.com/golang/protobuf/jsonpb github.com/golang/protobuf/ptypes/struct github.com/apache/beam/sdks/go/pkg/beam/model/fnexecution_v1 github.com/apache/beam/sdks/go/pkg/beam/util/grpcx github.com/apache/beam/sdks/go/pkg/beam/internal/errors Standard library imports context encoding/json time