def METHOD_NAME(platform_patches_dir, prepend_patches_dir):
    '''
    Prepends prepend_patches_dir into platform_patches_dir
    Returns True if successful, False otherwise
    '''
    if not (platform_patches_dir / _SERIES).exists():
        get_logger().error('Unable to find platform series file: %s',
                           platform_patches_dir / _SERIES)
        return False
    # Make series.orig file
    shutil.copyfile(str(platform_patches_dir / _SERIES), str(platform_patches_dir / _SERIES_ORIG))
    # Make series.prepend
    shutil.copyfile(str(prepend_patches_dir / _SERIES), str(platform_patches_dir / _SERIES_PREPEND))
    # Merge patches
    merge_patches([prepend_patches_dir], platform_patches_dir, prepend=True)
    (platform_patches_dir / _SERIES).replace(platform_patches_dir / _SERIES_MERGED)
    return True