1.2.4.6 BpmnEndEvent
the End Event indicates where a Process will end. In terms of Sequence Flow, the End Event ends the flow of the Process, and thus, will not have any outgoing Sequence Flow
BpmnThrowEventBpmnEndEvent
1.2.4.6.1 Consistency rules
no outgoing Sequence Flow: no Sequence Flow can connect from an End Event. If there is a Start Event, then there MUST be at least one End Event.