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: ghostscript.m
    path of file: ./repos/gift/GroupICAT/icatb/toolbox/export_fig
    
    the code of the file until where you have to start completion: function varargout = ghos
    
function path_ = gs_path
    % Return a valid path
    % Start with the currently set path
    path_ = user_string('ghostscript');
    % Check the path works
    if check_gs_path(path_)
        return
    end