Function render_modules 

pub fn render_modules(
    engine: &Tera,
    modules: Vec<&Module>,
    context: Option<Context>,
    template_name: &str,
) -> Result<String, Error>

Render the set of modules, with the template in the file template_name, and using engine.

If context is not specified a new blank object is created, and in either case a map is created under the key "modules" as a map from module name to module representation.

{
    "modules": {
        "Identifier": {},
    }
}

In the case of this function the result is returned as a String.