code: def map_into_course(self, course_key):
          
          return self.replace(usage_key=self.usage_key.map_into_course(course_key))
docs: Return a new :class:`UsageKey` or :class:`AssetKey` representing this usage inside the
          course identified by the supplied :class:`CourseKey`. It returns the same type as
          `self`
  
          Args:
              course_key (:class:`CourseKey`): The course to map this object into.
  
          Returns:
              A new :class:`CourseObjectMixin` instance.