public ItemStack insertRoundRobin(ItemStack stack, boolean simulate, boolean global) {
        List<ItemRoutePath> routePaths = net.getNetData(pipe.getPipePos(), facing);
        if (routePaths.isEmpty())
            return stack;
        if (routePaths.size() == 1)
            return insert(routePaths.get(0), stack, simulate);
        List<ItemRoutePath> routePathsCopy = new ArrayList<>(routePaths);

        if (global) {
            stack = insertToHandlersEnhanced(routePathsCopy, stack, routePaths.size(), simulate);
        } else {
            FMLLog.warning(
                    "11111111111111111111111111111111111111111111111111111111111111111111111111111111 first insertToHandlers call");
            stack = insertToHandlers(routePathsCopy, stack, simulate);
            if (!stack.isEmpty() && !routePathsCopy.isEmpty()) {
                FMLLog.warning(
                        "222222222222222222222222222222222222222222222222222222222222222222222222222222 second insertToHandlers call");
                stack = insertToHandlers(routePathsCopy, stack, simulate);
            }
        }

        return stack;
    }

    /**
     * Inserts items equally to all handlers
     * if it couldn't insert all items, the handler will be removed
     *
     * @param copy     to insert to
     * @param stack    to insert
     * @param simulate simulate
     * @return remainder
     */
    private ItemStack insertToHandlers(List<ItemRoutePath> copy, ItemStack stack, boolean simulate) {
        FMLLog.warning("VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV insertToHandlers begins ");
        Iterator<ItemRoutePath> routePathIterator = copy.listIterator();
        int insertedTotal = 0;
        FMLLog.warning("insertedTotal " + insertedTotal);
        int count = stack.getCount();
        FMLLog.warning("count " + count);
        int itemsPerHandler = count / copy.size();
        FMLLog.warning("itemsPerHandler " + itemsPerHandler);
        int initialRemainder = itemsPerHandler == 0 ? count % copy.size() : 0;
        FMLLog.warning("================================================================ iterations begin ");
        while (routePathIterator.hasNext()) {
            FMLLog.warning("--------------------------------------------------------------- iteration start ");
            ItemRoutePath routePath = routePathIterator.next();
            FMLLog.warning("facing " + routePath.toFacingPos().getFacing());
            int insertAmount = itemsPerHandler;
            FMLLog.warning("insertAmount set to " + insertAmount);
            if (initialRemainder > 0) {
                insertAmount++;
                initialRemainder--;
            }
            insertAmount = Math.min(insertAmount, stack.getCount() - insertedTotal);
            FMLLog.warning("insertAmount updated to " + insertAmount);
            if (insertAmount == 0) break;
            ItemStack toInsert = stack.copy();
            toInsert.setCount(insertAmount);
            FMLLog.warning("items in handler before insertion: " + routePath.getHandler().getStackInSlot(0).getCount() +
                    " " + routePath.getHandler().getStackInSlot(0).getDisplayName());
            int insertRemainder = insert(routePath, toInsert, simulate).getCount(); // Try to insert the items
            FMLLog.warning("items in handler after insertion: " + routePath.getHandler().getStackInSlot(0).getCount() +
                    " " + routePath.getHandler().getStackInSlot(0).getDisplayName());
            FMLLog.warning("insertRemainder " + insertRemainder);
            if (insertRemainder < insertAmount) { // if inserted anything
                insertedTotal += (insertAmount - insertRemainder);
            }
            FMLLog.warning("insertedTotal " + insertedTotal);
            if (insertRemainder == 1 && itemsPerHandler == 0 && insertAmount == 1) {
                initialRemainder++;
            }
            if (insertRemainder > 0) // if not inserted everything
                routePathIterator.remove();
            FMLLog.warning("--------------------------------------------------------------- iteration end ");
        }

        ItemStack outputRemainder = stack.copy();
        outputRemainder.setCount(count - insertedTotal);
        FMLLog.warning(
                "^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ insertToHandlers ends, outputRemainder: " +
                        outputRemainder.getCount() + " " + outputRemainder.getDisplayName());
        return outputRemainder;
    }