The getChildren() method can be implemented in a table's delegate class to specify the logical "child" records of a given record which can be used when creating hierarchical applications. This method will effectively override the output of the Dataface_Record::getChildren() method for records of this table.
function getChildren( Dataface_Record $record) : Dataface_Record
$record - The Dataface_Record that is the subject of the query
This method should return an array of Dataface_Record objects that are considered to be children of the subject record.
getParent? - A Delegate class method to return the logical parent of a given record.