How `~~~.thenStop().thenUnstashAll()` works in `Effect`?

EffectBuilder::thenStop() return EffectBuilder. So, I can chain another methods like thenRun or thenUnstashAll or thenReply().

But, it seems ambiguous to me that behaviors of thenReply or thenUnstashAll after thenStop.
The thenReply or thenUnstashAll can be performed after actor stops?
I want know exact behavior in case of ~~~.thenStop().thenUnstashAll() and ~~~.thenStop().thenReply().