question: public void deserializeFunnel ( List < Object > serializedFunnel ) { Set < Object > funnelStepAccumulator = new HashSet < > ( ) ; for ( Object e : serializedFunnel ) { if ( e != null ) { funnelStepAccumulator . add ( e ) ; } else { funnelSteps . add ( new HashSet < > ( funnelStepAccumulator ) ) ; funnelStepAccumulator . clear ( ) ; } } }
target:  Deserialize funnel steps. Have to deserialize the null separated list.