[Flutter] BottomNavigationBar without Text

Yes, my question is this. How can I do like this?



I did a BottomNavigationBar but it looks like this.



My codes are like this:

bottomNavigationBar: BottomNavigationBar(
items: <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home),
title: Text("Home"),
),
BottomNavigationBarItem(
icon: Icon(Icons.markunread),
title: Text("Chat"),
),
BottomNavigationBarItem(
icon: Icon(Icons.location_on),
title: Text("Your Country"),
),
],
fixedColor: Colors.blue,
onTap: clickedBottomBtn,
),

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