_flip_image_resource example

$image->rotate( $operation->angle );
                    } else {
                        $image = _rotate_image_resource( $image, $operation->angle );
                    }
                }
                break;
            case 'flip':
                if ( 0 != $operation->axis ) {
                    if ( $image instanceof WP_Image_Editor ) {
                        $image->flip( ( $operation->axis & 1 ) != 0, ( $operation->axis & 2 ) != 0 );
                    } else {
                        $image = _flip_image_resource( $image, ( $operation->axis & 1 ) != 0, ( $operation->axis & 2 ) != 0 );
                    }
                }
                break;
            case 'crop':
                $sel = $operation->sel;

                if ( $image instanceof WP_Image_Editor ) {
                    $size = $image->get_size();
                    $w    = $size['width'];
                    $h    = $size['height'];