Function set_button_fill

perro_editor/res/scripts/ui/editor_ui.rs:3779–3792

(
    ctx: &mut ScriptContext<'_, API>,
    name: &str,
    fill: &str,
)

    let Some(key) = state
        .selected_key
        .or_else(|| doc.scene.root.map(|key| key.as_u32()))
    else {
        return "target: scene root".to_string();
    };
    let Some(node) = cached_scene_node(&state.doc_text, key) else {
        return "target: scene root".to_string();
    };
    if state.add_node_as_sibling {
        let parent = node
            .parent
            .map(|key| doc.scene.key_name_or_id(key).to_string())
            .unwrap_or_else(|| "scene root".to_string());
        let kind = picker_parent_node_kind(state).unwrap_or("Root");
        return format!(
            "as sibling of {}  parent: {parent}  kind={kind}  Tab toggles",
            doc.scene.key_name_or_id(node.key)
        );