How to access container tab class

There is a tab in my application:

   <ion-tab [root]="tab1Root" tabTitle="Home" tabIcon="pulse"></ion-tab>
   <ion-tab [root]="tab2Root" tabTitle="News" tabIcon="chatbubbles"></ion-tab>
   <ion-tab [root]="tab3Root" tabTitle="Admin" tabIcon="cog"></ion-tab>

For example, I want to access the tab container instance inside my HomePage class. Is that possible? Thanks.

Or if there is a way to set left/right button in navigation bar?