use anyhow::Result;use handlebars::Handlebars;use rust_embed::RustEmbed;use serde::Serialize;use std::sync::Arc; #[derive(RustEmbed)]#[folder = "src/templates"]#[include = "*.hbs"]struct Assets; pub struct Templates(Handlebars<'static>); impl Templates {    pub fn new() -> Arc<Self> {        let mut handlebars = Handlebars::new();        handlebars.register_embed_templates::<Assets>().unwrap();        handlebars.register_escape_fn(|text| text.into());        Arc::new(Self(handlebars))    }} pub trait Template: Sized {    const TEMPLATE_NAME: &'static str;     fn render(&self, templates: &Templates) -> Result<String>    where        Self: Serialize + Sized,    {        Ok(templates.0.render(Self::TEMPLATE_NAME, self)?)    }}