When will sync::Api::new() return an Result::Err()?

[Adamska1008]

I try to handle the Error that Api::new() may return, but it seems that it never returns a error. Here's the related code in latest commit 6303587576f8a1ce9f91f8274265a153b89afb6e:

// src/api/sync.rs
impl Api {
    /// Creates a default Api, for Api options See [`ApiBuilder`]
    pub fn new() -> Result<Self, ApiError> {
        ApiBuilder::new().build()
    }
// ...
}

// src/api/sync.rs
impl ApiBuilder {
//...
    /// Consumes the builder and buids the final [`Api`]
    pub fn build(self) -> Result<Api, ApiError> {
        let headers = self.build_headers();

        let agent = ureq::builder().try_proxy_from_env(true).build();
        let client = HeaderAgent::new(agent, headers.clone());

        let no_redirect_agent = ureq::builder()
            .try_proxy_from_env(true)
            .redirects(0)
            .build();
        let no_redirect_client = HeaderAgent::new(no_redirect_agent, headers);

        Ok(Api {
            endpoint: self.endpoint,
            url_template: self.url_template,
            cache: self.cache,
            client,

            no_redirect_client,
            progress: self.progress,
        })
    }
}

Is it possible to modify the return value definition of this method?