'Return a list of (msg, exception-or-None) errors that the modulestore
encountered when loading the course at course_id.
Raises the same exceptions as get_item if the location isn\'t found or
isn\'t fully specified.
Args:
course_key (:class:`.CourseKey`): The course to check for errors'

@abstractmethod
def get_course_errors(self, course_key):

    pass
