code: @NotNull
      public LongStream filterIndexed(int from, int step,
                                      @NotNull IndexedLongPredicate predicate) {
          return new LongStream(params, new LongFilterIndexed(
                  new PrimitiveIndexedIterator.OfLong(from, step, iterator),
                  predicate));
      }
docs: Returns a {@code LongStream} with elements that satisfy the given {@code IndexedLongPredicate}.
  
  <p>This is an intermediate operation.
  
  <p>Example:
  <pre>
  from: 4
  step: 3
  predicate: (index, value) -&gt; (index + value) &gt; 15
  stream: [1, 2,  3,  4,  0, 11]
  index:  [4, 7, 10, 13, 16, 19]
  sum:    [5, 9, 13, 17, 16, 30]
  filter: [          17, 16, 30]
  result: [4, 0, 11]
  </pre>
  
  @param from  the initial value of the index (inclusive)
  @param step  the step of the index
  @param predicate  the {@code IndexedLongPredicate} used to filter elements
  @return the new stream
  @since 1.2.1