You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: server.go
    path of file: ./repos/dtm/client/workflow
    
    the code of the file until where you have to start completion: package workflow

import (
	"context"

	"github.com/dtm-labs/dtm/client/dtmcli/dtmimp"
	"github.com/dtm-labs/dtm/client/dtmgrpc"
	"github.com/dtm-labs/dtm/client/dtmgrpc/dtmgimp"
	"github.com/dtm-labs/dtm/client/workflow/wfpb"
	"google.golang.org/grpc/codes"
	"googl
    
func (s *workflowServer) Execute(ctx context.Context, wd *wfpb.WorkflowData) (*emptypb.Empty, error) {
	if defaultFac.protocol != dtmimp.ProtocolGRPC {
		return nil, status.Errorf(codes.Internal, "workflow server not inited. please call workflow.InitGrpc first")
	}
	tb := dtmgimp.TransBaseFromGrpc(ctx)
	_, err := defaultFac.execute(ctx, tb.Op, tb.Gid, wd.Data)
	return &emptypb.Empty{}, dtmgrpc.DtmError2GrpcError(err)
}