Fired when a pending chain completes: the chain timeout expired, an end key matched, or execute returned null. The chain's keys are recorded in the undo buffer at this point.
execute
null
Event discriminant — always "completed".
"completed"
Fired when a pending chain completes: the chain timeout expired, an end key matched, or
executereturnednull. The chain's keys are recorded in the undo buffer at this point.