def _is_unpacked_egg(path):
    """
    Determine if given path appears to be an unpacked egg.
    """
    return path.lower().endswith('.egg') and os.path.isfile(
        os.path.join(path, 'EGG-INFO', 'PKG-INFO')
    )

    Determine if given path appears to be an unpacked egg.
    
product/runtime/src/main/python/pkg_resources/__init__.py