151     private $headerFooterImages = [];  variable in PhpOffice\\PhpSpreadsheet\\Worksheet\\HeaderFooter
410         $this->headerFooterImages[$location] = $image;
424         if (isset($this->headerFooterImages[$location])) {
425             unset($this->headerFooterImages[$location]);
440         $this->headerFooterImages = $images;
454         if (isset($this->headerFooterImages[self::IMAGE_HEADER_LEFT])) {
455             $images[self::IMAGE_HEADER_LEFT] = $this->headerFooterImages[self::IMAGE_HEADER_LEFT];
457         if (isset($this->headerFooterImages[self::IMAGE_HEADER_CENTER])) {
458 …         $images[self::IMAGE_HEADER_CENTER] = $this->headerFooterImages[self::IMAGE_HEADER_CENTER];
460         if (isset($this->headerFooterImages[self::IMAGE_HEADER_RIGHT])) {
461             $images[self::IMAGE_HEADER_RIGHT] = $this->headerFooterImages[self::IMAGE_HEADER_RIGHT];
463         if (isset($this->headerFooterImages[self::IMAGE_FOOTER_LEFT])) {
464             $images[self::IMAGE_FOOTER_LEFT] = $this->headerFooterImages[self::IMAGE_FOOTER_LEFT];
466         if (isset($this->headerFooterImages[self::IMAGE_FOOTER_CENTER])) {
467 …         $images[self::IMAGE_FOOTER_CENTER] = $this->headerFooterImages[self::IMAGE_FOOTER_CENTER];
469         if (isset($this->headerFooterImages[self::IMAGE_FOOTER_RIGHT])) {
470             $images[self::IMAGE_FOOTER_RIGHT] = $this->headerFooterImages[self::IMAGE_FOOTER_RIGHT];
472         $this->headerFooterImages = $images;
474         return $this->headerFooterImages;