put value to a given key . it allows duplicates under the same key concode_field_sep Map<K,List<V>> backingMap concode_field_sep Set<Map.Entry<K,List<V>>> entrySet concode_elem_sep Collection<V> get
void function ( K arg0 , V arg1 ) { List < V > loc0 = backingMap . get ( arg0 ) ; if ( loc0 == null ) { loc0 = new ArrayList < V > ( ) ; backingMap . put ( arg0 , loc0 ) ; } loc0 . add ( arg1 ) ; }