Kibana plugin search elastic

I am creating a plugin in Kibana 7.0.1, to search through api, with an http request through server.route.
In the new kibana plugins I can see:
<navigation.ui.TopNavMenu
appName={PLUGIN_ID}
showSearchBar={true}
useDefaultBehaviors={true}
indexPatterns={indexPattern ? [indexPattern] : undefined}
/>

to enable the search bar. I also want the search bar, when I search, where can I add it. This is my code:

Check this example, it will help you on how to integrate TopNavMenu into your custom plugin

But thats the new Kibana, I am using Kibana 7.0.1, trying to integrate (firstly display) the search bar with the elastic search query.

We also have a very simple sample plugin using TopNavMenu here.

However, are you mentioned you're using 7.0.1? TopNavMenu was first introduced in it's current form in 7.5

Exactly, I'm using kibana 7.0.1

Your code snippet is from a much later version.
Like I said, TopNavMenu was introduced in 7.5.
7.0 had an Angular directive for topNavMenu.

So I don't fully understand how what youre trying to do can work.