public static <T>MutableSeq<T> newMutableSeq(T value){
  Collection<T> collection=new ArrayList<>();
  collection.add(value);
  return new SeqImpl<>(collection);
}

public static < T > MutableSeq < T > newMutableSeq ( T value ) { Collection < T > collection = new ArrayList < > ( ) ; collection . add ( value ) ; return new SeqImpl < > ( collection ) ; }
create an mutableseq with the single value
