FlatMapTry.java

        //Given
        interface CheckedFunction<T, R> {
          R apply(T t) throws Exception;
        }
        
        //Does not compile
        public <U> Try<U> flatMap(final CheckedFunction<? super T, Try<U>> f) {
            return f.apply(value);
        }

        //Breaks laws on the 'x -> throws execption' case 
        public <U> Try<U> flatMap(final CheckedFunction<? super T, Try<U>> f) {
            try {
                return f.apply(value);
            } catch (Exception e) {
                return Try.failure(e);
            }
        }

        //is unpleasant to use
        public <U> Try<U> flatMap(final CheckedFunction<? super T, Try<U>> f) throws Exception {
            return f.apply(value);
        }