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: topical_doc_data.rs
    path of file: ./repos/rustup/src/test/mock
    
    the code of the file until where you have to start completion: use std::collections::HashSet;
use std::path::PathBuf;

// Paths are written as a string in the UNIX format 
    
fn repath(origin: &str) -> String {
    // Add doc prefix and rewrite string paths for the current platform
    let with_prefix = "share/doc/rust/html/".to_owned() + origin;
    let splitted = with_prefix.split('/');
    let repathed = splitted.fold(PathBuf::new(), |acc, e| acc.join(e));
    repathed.into_os_string().into_string().unwrap()
}