WP_Site_Icon::get_post_metadata( null|array|string $value, int $post_id, string $meta_key, bool $single ): array|null|string

229	public function get_post_metadata( $value, $post_id, $meta_key, $single ) {230		if ( $single && '_wp_attachment_backup_sizes' === $meta_key ) {231			$site_icon_id = (int) get_option( 'site_icon' );232 233			if ( $post_id === $site_icon_id ) {234				add_filter( 'intermediate_image_sizes', array( $this, 'intermediate_image_sizes' ) );235			}236		}237 238		return $value;239	}