"${applicationName}" in flutter android manifest?

[Bened]

The Manifest does not like this new recent variable:

android:name="${applicationName}" , what is its purpose?

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="xxxx.com.zzzzzzz">

   <application

        android:label="zzzzzzz"

        android:name="${applicationName}"    ????????

        android:icon="@mipmap/ic_launcher">

        <activity