Replace/Override template for CategoryView?

Hi,

Wondering if it's at all possible to use custom HTML to replace the CategoryView's template when adding a new block?

I've tried a couple things, but just based on the source code, I'm not seeing a way.

editor.BlockManager.add(name, {
            category: {
                view: {
                    template: '<div><h1>Layout</h1></div>',
                    render() {
                        this.$el.html(this.template);
                        return this;
                    }
                }
            },
            ...
        });