Function generate_doc 

pub fn generate_doc<P: AsRef<Path>, Q: AsRef<Path>, R: AsRef<Path>>(
    lib_dir: P,
    doc_dir: Q,
    lib_path: R,
) -> Result<()>

Generates a documentation in the documentation directory for the library directory and the library path.

See generate_doc_tree, DocGen::new, and DocGen::generate.