.computeRenderDataRec = function (cols, colId, pos, depth, result, leftBorder, rightBorder) {
            if (result.length === depth) {
                const array = [];
                if (pos > 0) {
                    let j = 0
                    for (let i = 0; j < pos; i++) {
                        let c = result[depth - 1][i]
                        j += c.span
                        let copy = Object.assign({empty: true}, c)
                        array.push(copy)
                    }
         