Function config 

pub fn config<F>(
    account: &Option<String>,
    domain: &Option<String>,
    home_dir: &Option<String>,
    bin_path: &Option<String>,
    lib_path: &Option<String>,
    doc_path: &Option<String>,
    f: F,
) -> Option<i32>
where
    F: FnOnce(&mut Home) -> bool,

A config command.