Function mail::default_impl::load_data

pub fn load_data<R, F>(
    path: PathBuf, 
    use_media_type: UseMediaType, 
    use_file_name: Option<String>, 
    ctx: &impl Context, 
    post_process: F
) -> Box<dyn Future<Item = R, Error = ResourceLoadingError> + 'static + Send> where
    F: FnOnce(Data) -> Result<R, ResourceLoadingError> + Send + 'static,
    R: Send + 'static,