pub trait FixedExt: 'static {
// Required methods
fn child_position(&self, widget: &impl IsA<Widget>) -> (f64, f64);
fn child_transform(&self, widget: &impl IsA<Widget>) -> Option<Transform>;
fn move_(&self, widget: &impl IsA<Widget>, x: f64, y: f64);
fn put(&self, widget: &impl IsA<Widget>, x: f64, y: f64);
fn remove(&self, widget: &impl IsA<Widget>);
fn set_child_transform(
&self,
widget: &impl IsA<Widget>,
transform: Option<&Transform>
);
}