@classmethod<EOL><INDENT>def get_base_url_path_for_course_assets(cls, course_key):<DEDENT>
if course_key is None:<EOL><INDENT>return None<EOL><DEDENT>placeholder_id = uuid.uuid4().hex<EOL>url_path = cls.serialize_asset_key_with_slash(<EOL>course_key.make_asset_key('<STR_LIT>', placeholder_id).for_branch(None)<EOL>)<EOL>return url_path.replace(placeholder_id, '<STR_LIT>')<EOL>
Slightly modified version of StaticContent.get_base_url_path_for_course_assets.

Code is copied as we don't want to introduce the dependency of edx-platform so that we can
develop in workbench

Args:
    course_key (str): CourseKey

Returns:
    str: course asset base URL string