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: rm_default_transform.rs
    path of file: ./repos/svgcleaner/src/task
    
    the code of the file until where you have to start completion: // svgcleaner could help you to clean up your SVG files
// from unnecessary data.
// Copyright (C) 2012-2018 Evgeniy Reizner
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public Lice
    
pub fn remove_default_transform(doc: &Document) {
    for mut node in doc.descendants() {
        let av = node.attributes().get_value(AId::Transform).cloned();
        if let Some(AttributeValue::Transform(ts)) = av {
            if ts.is_default() {
                node.remove_attribute(AId::Transform);
            }
        }
    }
}