import { Options } from './types';
export declare class Transformers {
    protected isObject(val: any): void;
    private stringify;
    protected tresize(val: Options['resize']): string;
    protected tsize(val: Options['size']): string;
    protected textend(val: Options['extend']): string;
    protected textendAspectRatio(val: Options['extend_aspect_ratio']): string;
    protected tgravity(val: Options['gravity']): string;
    protected tcrop(val: Options['crop']): string;
    protected ttrim(val: Options['trim']): string;
    protected tpadding(val: Options['padding']): string;
    protected tbackground(val: Options['background']): string | undefined;
    protected tadjust(val: Options['adjust']): string;
    protected tunsharpMasking(val: Options['unsharp_masking']): string;
    protected tblurDetections(val: Options['blur_detections']): string;
    protected tdrawDetections(val: Options['draw_detections']): string;
    protected tgradient(val: Options['gradient']): string;
    protected tskipProcessing(val: Options['skip_processing']): string;
    protected tpreset(val: Options['preset']): string;
    protected twatermark(val: Options['watermark']): string;
    protected tformatQuality(val: Options['format_quality']): string;
    protected tjpegOptions(val: Options['jpeg_options']): string;
    protected tpngOptions(val: Options['png_options']): string;
    protected tgifOptions(val: Options['gif_options']): string;
    protected zoomOptions(val: Options['zoom']): string;
}