);     for (i = 0; i < n; i++) {         pix = pixaGetPix(pixa0, i, copyflag);         pixaAddPix(pixad, pix, L_INSERT);         if (i < nb0) {             box = pixaGetBox(pixa0, i, L_COPY);             pixaAddBox(pixad, box, L_INSERT);         }         pix = pixaGetPix(pixa0, i, copyflag);         pixaAddPix(pixad, pix, L_INSERT);         if (i < nb0) {             box = pixaGetBox(pixa0, i, L_COPY);             pixaAddBox(pixad, box, L_INSERT);         }     }      return pixad; }   /*!  * \brief   pixa