are_files_available     Check whether the given files exist in the
                        package cache.
ensure_files_available
                        Ensure all given files exist in the file cache,
                        download them if they are not.
ensure_files_available_from_manifest
                        Ensure the files described in a manifest are
                        available in the file cache.
erase_file_cache        Delete the full package cache directory for the
                        given package.
get_absolute_path_for_files
                        Construct absolute path for package cache
                        files.
get_cache_dir           Get the absolute path of the package cache.
get_filepath            Retrieve the path to a single file from the
                        package cache.
get_pkg_info            Construct a pkg_info object to be used with all
                        other functions.
list_available          List files that are available locally in the
                        package cache.
manifest_cli            Run the manifest generation command line
                        interface (CLI).
manifest_script         Get the path of the standalone manifest
                        generation script.
read_manifest           Read a file manifest for optional data files.
remove_cached_files     Delete all the given files from the package
                        cache.
write_manifest_from_dir
                        Generate a file manifest from a directory of
                        local files.
