Unable to set global styles about xamarin.plugins HOT 1 CLOSED

<?xml version="1.0" encoding="utf-8" ?>
<Application xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:iconize="clr-namespace:FormsPlugin.Iconize;assembly=FormsPlugin.Iconize"
             x:Class="Foo.App">
	<Application.Resources>

        <ResourceDictionary>

            <!-- other global styles ... -->

            <Style TargetType="iconize:IconNavigationPage">
                <Setter Property="BarBackgroundColor" Value="Color.Black"/>
                <Setter Property="BarTextColor" Value="Color.White"/>
            </Style>
            
        </ResourceDictionary>

    </Application.Resources>
</Application>