LDLMS_Course_Steps::_steps_reverse_keys_walk()
Method: Internal utility function to reverse walk the Course steps nodes and items
Source: includes/classes/class-ldlms-course-steps.php:342
LDLMS_Course_Steps::_flatten_item_parent_steps()
Method: Internal utility function to reverse parent keys of the Course nodes and items.
Source: includes/classes/class-ldlms-course-steps.php:374