question: emits mergedtuple on mergedport if it is not empty concode_field_sep HashMap<K,HighLow<V>> mergedTuple concode_elem_sep DefaultOutputPort<HashMap<K,HighLow<V>>> mergedport concode_field_sep void beginWindow concode_elem_sep void process concode_elem_sep void setup concode_elem_sep void teardown
target: void function ( ) { if ( ! mergedTuple . isEmpty ( ) ) { mergedport . emit ( mergedTuple ) ; mergedTuple = new HashMap < K , HighLow < V >> ( ) ; } }