'Copy all the course assets from source_course_key to dest_course_key.
NOTE: unlike get_all_asset_metadata, this does not take an asset type because
this function is intended for things like cloning or exporting courses not for
clients to list assets.
Arguments:
source_course_key (CourseKey): identifier of course to copy from
dest_course_key (CourseKey): identifier of course to copy to
user_id (int): user ID copying the asset metadata'

@contract(source_course_key='CourseKey', dest_course_key='CourseKey')
def copy_all_asset_metadata(self, source_course_key, dest_course_key, user_id):

    pass
