declare namespace Ext {
    export namespace chart {
        export namespace axis {
            export namespace segmenter {
                export interface SegmenterConfig {
                    axis?: Ext.chart.axis.Axis;
                }

                export class Segmenter extends Ext.Base  {
                    public add(value?: any, step?: number, unit?: any): void;
                    public align(value?: any, step?: number, unit?: any): any;
                    public diff(min?: any, max?: any, unit?: any): number;
                    public from(value?: any): any;
                    public getAxis(): void;
                    public preferredStep(start?: any, estStepSize?: any): object;
                    public renderer(value?: any, context?: object): string;
                    public setAxis(): void;
                }
            }
        }
    }
}