How to use undocumented sort_by clause modified_subnode

Question

Have you ever wanted to sort a standard content fetch (say 'list') using the node object's modified_subnode field? Well .. you can!

Example

Here is a code example of how to use this undocumented sort_by clause.

{def$root_node=fetch('content', 'node', hash('node_id', $pagedata.path_array[$left_menu_depth].node_id ))$left_menu_items=fetch('content', 'list', hash('parent_node_id', $root_node.node_id,
                                                                                    'sort_by', array('modified_subnode', false()),
                                                                                    'load_data_map', false(),
                                                                                    'class_filter_type', 'include',
                                                                                    'class_filter_array', ezini('MenuContentSettings', 'LeftIdentifierList', 'menu.ini'))) 

Worth mentioning 'modified_subnode' is not a perfect sort order, at times it may leave somethings to be desired in terms of accuracy, but for me today on eZecosystem.org it was better that using 'modified' or 'published'!