How to use in XML
> Use via XML
> If you use the Iconics library via XML provide the icon you want to use in the following syntax: gmd-favorite --> fontId-iconName. A list of the available fonts and their fontId can be found here. All icon names from the default fonts can be found via the DEMO application.

I don't understand. What I want is like
```
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:drawableEndCompat="@drawable/**here_is_what_i_need**"
 />
```