Importance of calling mapState.clear() when no entries in mapState

[Ilya Karpov]

Hi,

given: 
- flink 1.6.1
- stateful function with MapState<K, V> mapState = //init logic;

Is there any reason I should call mapState.clear() if I know beforehand that 
there are no entries in mapState (e.g. mapState.iterator().hasNext() returns 
false)?

Thanks in advance!