heif_image_handle_get_metadata_content_type 505 libheif-1.3.2/libheif/heif.h const char* heif_image_handle_get_metadata_content_type(const struct heif_image_handle* handle, heif_image_handle_get_metadata_content_type 612 libheif-1.3.2/libheif/heif_cxx.h return heif_image_handle_get_metadata_content_type(m_image_handle.get(), metadata_id);