return true;
            }
        };
        private static final Selection<Object> NO_MORE_WORK_TO_START = new Selection<Object>() {
            @Override
            public boolean isNoMoreWorkToStart() {
                return true;
            }
        };


        public static <S> Selection<S> of(S item) {
            return new Selection<S>() {
                @Override

            while (iterator.hasNext()) {
                PlanDetails details = iterator.next();
                WorkSource.Selection<Object> selection = details.source.selectNext();
                if (selection.isNoMoreWorkToStart()) {
                    if (details.source.allExecutionComplete()) {
                        iterator.remove();
                    }