public static <T,K,L extends List<T>>BiFunction<Partition<T,K,L>,T,Boolean> alwaysInsert(){
  return null;
}

public static < T , K , L extends List < T > > BiFunction < Partition < T , K , L > , T , Boolean > alwaysInsert ( ) { return null ; }
returns an insertion policy that indicates the tuple is to be inserted into the partition .
