Function paint_node_tree

pub fn paint_node_tree(
    node_ref: NodeRef,
    scene_arena: &Arena<SceneNode>,
    renderables_arena: &IndexMap<usize, SceneNodeRenderable>,
    render_canvas: &Canvas,
    render_layer: &RenderLayer,
    context_opacity: f32,
    offscreen: bool,
    dbg_info: Option<&DrawDebugInfo>,
    skip_self: bool,
    occluded: Option<&HashSet<NodeRef>>,
    damage_region: Option<&Region>,
)

paint a node and his subtree in the provided canvas