Add Start/End Events

Prepends a path_start synthetic event and appends a path_end synthetic event to each path. Idempotent — paths that already start or end with these events are not modified.

In most cases you do not need to call this processor manually. All widgets add path_start and path_end automatically during computation. This matters because the placement of these events depends on path_id_col, which can be overridden per widget — so adding them upfront would lock them to one specific path definition. Let the widgets handle it.

Usage

es.add_start_end_events()

Parameters