def traverse_tree(cls, static_dir):
        """traverse the static folders an look for at least one file ending in .scss/.sass"""
        for root, dirs, files in os.walk(static_dir):
            for filename in files:
                if cls._pattern.match(filename):
                    APPS_INCLUDE_DIRS.append(static_dir)
                    return
traverse the static folders an look for at least one file ending in .scss/.sass