ctrl+z

    }

    private fun sortByKey(images: List<Image>): List<Bitmap> {

        val result = ArrayList<Bitmap>()

        val result = kotlin.arrayOfNulls<Bitmap>(images.size)

        images.forEach {

            result[it.key] = it.image

        }

        return makeNonNull(result)

    }

    private fun makeNonNull(images: Array<Bitmap?>):List<Bitmap> {

        val result = ArrayList<Bitmap>()

        images.forEach {

            result.add(it!!)

        }

        return result

    }