Gtk.StyleContext.prototype.add_provider

function add_provider(provider:Gtk.StyleProvider, priority:Number):void {
    // Gjs wrapper for gtk_style_context_add_provider()
}

Adds a style provider to context, to be used in style construction. Note that a style provider added by this function only affects the style of the widget to which context belongs. If you want to affect the style of all widgets, use Gtk.add_provider_for_screen.

<note><para>If both priorities are the same, A Gtk.StyleProvider added through this function takes precedence over another added through Gtk.add_provider_for_screen.</para></note>

Since 3.0