pub fn add_layer_to_top(&mut self) -> LayerHandle {
        let handle = LayerHandle::generate();
        self.layers.insert(handle, Layer::empty());
        self.render_order.push(handle);
        handle
    }
/// Add a layer to be rendered on top of all existing layers.
Add a layer to be rendered on top of all existing layers.
Add a layer to be rendered on top of all existing layers .
pub fn add_layer_to_top(&mut self) -> LayerHandle {
        let handle = LayerHandle::generate();
        self.layers.insert(handle, Layer::empty());
        self.render_order.push(handle);
        handle
    }
pub fn add_layer_to_top ( & mut self ) -> LayerHandle { let handle = LayerHandle :: generate ( ) ; self . layers . insert ( handle , Layer :: empty ( ) ) ; self . render_order . push ( handle ) ; handle }
Add a layer to be rendered on top of all existing layers.
Add a layer to be rendered on top of all existing layers .
&mut self