PNG Example for LVGL 9.x

in the file lv_libpng.c are headers

#include "../../draw/lv_image_decoder_private.h"
#include "../../../lvgl.h"
#if LV_USE_LIBPNG
#include "lv_libpng.h"
#include <png.h>
#include <string.h>
#include "../../core/lv_global.h"

I can’t find .pio/libdeps/cyd/lvgl/src/libs/libpng/lv_libpng.c:14:10: fatal error: png.h: No such file or directory