private void considerAddingToRight(int startAt, boolean hasNotFlushedText) {
    logger.trace(
        "adding to right, i: {}, leftHeight: {}, leftSplit: {}",
        startAt,
        currentLeftResult.leftColumnHeight,
        currentLeftResult.leftElementSplitHeight);

    // copy content from the left
    rightCTB.setACopy(leftCTB).setYLine(leftCTB.getTop());

    if (!hasNotFlushedText && sequence.isSpace(startAt)) {
      startAt++;
    }

    // we can flush what's left from the previous column
    if (rightCTB.hasMoreText()) {
      rightCTB.go(true);
    }

    currentRightResult.copyFrom(currentLeftResult);

    // copied from left method
    int i;

    List<Element> elements = sequence.getElements();

    final DirectContentAdder.Result quickResult =
        new DirectContentAdder(rightCTB)
            .setStartWith(leftCTB)
            .setStartAtIndex(startAt)
            .setQuickHeight(leftCTB.getCurrentHeight())
            .setSimulate(true)
            .go();

    i = quickResult.index;

    int elementsAdded = quickResult.contentLeft == null ? i : i - 1;

    bestResult.assignIfWorseThan(
        currentRightResult
            .setElementsAddedCount(elementsAdded) // todo!!!
            .setRightElementSplitHeight(0, 0)
            .setRightColumnHeight(rightCTB.getCurrentHeight())
            .setPageSplit(elementsAdded, quickResult.hasContentLeft(elements.size())));

    boolean pageOverFlow = false;

    if (quickResult.contentLeft != null) {
      rightCTB.copyContentFrom(quickResult.contentLeft);
      AtomicIncreaseResult lastResult =
          iterateOnRight(
              i - 1, currentRightResult, rightCTB.getTop(), rightCTB.newAtomicIteratorFor());
      if (lastResult.type == ColumnTextBuilder.GrowthResultType.PAGE_OVERFLOW) {
        pageOverFlow = true;
      }
    }

    if (i == elements.size()) {
      bestResult.assignIfWorseThan(
          currentRightResult
              .setRightElementSplitHeight(0, 0)
              .setRightColumnHeight(rightCTB.getCurrentHeight())
              .setElementsAddedCount(i)
              .setPageSplit(i, rightCTB.hasMoreText()));
    }

    if (pageOverFlow) return;

    elementsCycle:
    for (; i < elements.size(); i++) {
      Element el = elements.get(i);

      final SplitResult currentResult = currentRightResult;

      setFullAddedElementsStateRight(currentResult, i, rightCTB.getCurrentHeight());

      currentResult.setPageSplit(true); // temporary pessimism

      if (el instanceof SpaceElement) {
        // todo extract method
        SpaceElement space = (SpaceElement) el;

        bestResult.assignIfWorseThan(currentResult.setElementsAddedCount(i).setPageSplit(i, false));

        if (space.fits(rightCTB, origRectangle.getBottom())) {
          space.add(rightCTB, true);
        } else {
          if (rightCTB.getSimpleColumnRectangle().getBottom() - space.getHeight()
              < b.getDocument().bottom()) {
            break;
          }

          rightCTB.growBottom(space.getHeight()).setYLine(rightCTB.getYLine() - space.getHeight());
        }
      } else {
        float elementTop = rightCTB.getYLine();

        final Iterator<AtomicIncreaseResult> iterator = rightCTB.newAtomicIteratorFor(el);

        AtomicIncreaseResult lastResult = iterateOnRight(i, currentResult, elementTop, iterator);

        if (lastResult.type == ColumnTextBuilder.GrowthResultType.PAGE_OVERFLOW) {
          break;
        }
      }

      // element is fully added here
      currentResult
          .setRightColumnHeight(rightCTB.getCurrentHeight())
          .setRightElementSplitHeight(0, 0);

      bestResult.assignIfWorseThan(currentResult);
    }
  }
    public Result go() {
      if (quickHeight != 0) {
        if (rightCTB != null) {
          throw new IllegalStateException("if quickHeight !=0 then rightCTB == null!");
        }
      }

      Preconditions.checkNotNull(dest);

      ColumnTextBuilder currentCtb = dest;
      List<Element> elements = sequence.getElements();

      int i;

      if (quickHeight != 0) {
        currentCtb.adjustBottom((float) quickHeight);
      }

      if (startWith != null) {
        currentCtb.copyContentFrom(startWith);

        float yBefore = currentCtb.getYLine();

        int status = currentCtb.go(simulate);

        if (setHeights) {
          startContentHeight = yBefore - currentCtb.getYLine();
        }

        if (ColumnText.hasMoreText(status)) {
          if (rightCTB != null) { // => quickHeight == 0
            rightCTB.copyContentFrom(currentCtb);

            currentCtb = rightCTB;

            yBefore = currentCtb.getYLine();

            status = currentCtb.go(simulate);

            if (setHeights) {
              startContentHeight += yBefore - currentCtb.getYLine();
            }

            if (ColumnText.hasMoreText(status)) {
              return new Result(ColumnText.NO_MORE_COLUMN, startAtIndex, currentCtb);
            }
          } else {
            return new Result(ColumnText.NO_MORE_COLUMN, startAtIndex, currentCtb);
          }
        }
      }

      // optimisation mode
      if (quickHeight != 0) {
        for (i = startAtIndex; i < elements.size(); i++) {
          Element el = elements.get(i);

          if (currentCtb.fits(el)) {
            if (el instanceof SpaceElement) {
              SpaceElement spaceElement = (SpaceElement) el;
              spaceElement.add(currentCtb, simulate);
              currentCtb.go(simulate);
            } else {
              currentCtb.addElement(el).go(simulate);
            }
          } else {
            break;
          }
        }

        return new Result(ColumnText.NO_MORE_TEXT, i, null);
      }

      for (i = startAtElement; i < elements.size(); i++) {
        Element el = elements.get(i);

        float yBefore = currentCtb.getYLine();

        if (el instanceof SpaceElement) {
          SpaceElement space = (SpaceElement) el;

          if (space.fits(currentCtb, currentCtb.getBottom())) {
            space.add(currentCtb, simulate);
          } else {
            if (currentCtb == dest) {
              currentCtb = rightCTB;
            } else if (currentCtb == rightCTB) {
              return new Result(ColumnText.NO_MORE_COLUMN, i + 1, currentCtb.clearContent());
            }
          }
        } else {
          currentCtb.addElement(el);

          if (ColumnText.hasMoreText(currentCtb.go(simulate))) {
            if (currentCtb == dest) {
              if (rightCTB == null) {
                return new Result(ColumnText.NO_MORE_COLUMN, i + 1, currentCtb);
              } else {
                rightCTB.copyContentFrom(currentCtb);

                currentCtb = rightCTB;

                final int status = currentCtb.go(simulate);

                if (ColumnText.hasMoreText(status)) {
                  return new Result(ColumnText.NO_MORE_COLUMN, i + 1, currentCtb);
                }
              }
            } else {
              return new Result(ColumnText.NO_MORE_COLUMN, i + 1, currentCtb);
            }
          }
        }

        if (setHeights) {
          sequence.setHeight(i, yBefore - currentCtb.getYLine());
        }
      }

      return new Result(ColumnText.NO_MORE_TEXT, elements.size(), null);
    }