Function de_gui::focus::focus_system

fn focus_system(
    focus: ResMut<'_, UiFocus>,
    removals: RemovedComponents<'_, '_, Interaction>,
    mouse: Res<'_, ButtonInput<MouseButton>>,
    touch: Res<'_, Touches>,
    interactions: Query<'_, '_, (Entity, &Interaction), Changed<Interaction>>,
    events: EventReader<'_, '_, SetFocusEvent>
)