bubble_path - Control reference path

In order to send the event to another control, the field path for the event receiving control has to be defined here. When the target control is not an element of the current control, but an element of one of its parents, the path has to be preceded by one or more dots. Each dot means going up one level in the control hierarchy.

When defining a bubble path, bubble type should be set to ABT_local or ABT_undefined. Otherwise, the bubble path will be ignored.