You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tera_templates.rs
    path of file: ./repos/Rocket/contrib/dyn_templates/src
    
    the code of the file until where you have to start completion: use std::path::Path;
use std::error::Error;

use rocket::serde::Serialize;

use crate::engine::Engine;

pub use crate::tera::{Context, Tera};

impl Engine for Tera {
    const EXT: &'static str = "tera";

    fn init<'a>(templates: impl Iterator<Item = (&'a str, &'a Path)>) -> Option<Self> {

    
    fn init<'a>(templates: impl Iterator<Item = (&'a str, &'a Path)>) -> Option<Self> {
        // Create the Tera instance.
        let mut tera = Tera::default();
        let ext = [".html.tera", ".htm.tera", ".xml.tera", ".html", ".htm", ".xml"];
        tera.autoescape_on(ext.to_vec());

        // Collect into a tuple of (name, path) for Tera. If we register one at
        // a time, it will complain about unregistered base templates.
        let files = templates.map(|(name, path)| (path, Some(name)));

        // Finally try to tell Tera about all of the templates.
        if let Err(e) = tera.add_template_files(files) {
            error!("Failed to initialize Tera templating.");

            let mut error = Some(&e as &dyn Error);
            while let Some(err) = error {
                info_!("{}", err);
                error = err.source();
            }

            None
        } else {
            Some(tera)
        }
    }