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: home.go
    path of file: ./repos/client/go/home
    
    the code of the file until where you have to start completion: // Copyright 2019 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.

package home

import (
	"encoding/json"
	"fmt"
	"math/rand"
	"strings"
	"sync"
	"time"

	"github.com/keybase/client/go/co
    
func (h *Home) updateUI(ctx context.Context) (err error) {
	defer h.G().CTrace(ctx, "Home#updateUI", &err)()
	var ui keybase1.HomeUIInterface
	if h.G().UIRouter == nil {
		h.G().Log.CDebugf(ctx, "no UI router, swallowing update")
		return nil
	}
	ui, err = h.G().UIRouter.GetHomeUI()
	if err != nil {
		return err
	}
	if ui == nil {
		h.G().Log.CDebugf(ctx, "no registered HomeUI, swallowing update")
		return nil
	}
	err = ui.HomeUIRefresh(context.Background())
	return err
}