declare namespace Ext {
    export namespace drag {
        export interface ConstraintConfig {
            element?: boolean | string | Ext.dom.Element;
            horizontal?: boolean;
            region?: Ext.util.Region;
            snap?: number | object;
            source?: Ext.drag.Source;
            vertical?: boolean;
            x?: number[];
            y?: number[];
        }

        export class Constraint extends Ext.Base  {
            public constrain(xy?: number[], info?: Ext.drag.Info): number[];
            public getElement(): void;
            public getHorizontal(): void;
            public getRegion(): void;
            public getSnap(): void;
            public getSource(): void;
            public getVertical(): void;
            public getX(): void;
            public getY(): void;
            public setElement(): void;
            public setHorizontal(): void;
            public setRegion(): void;
            public setSnap(): void;
            public setSource(): void;
            public setVertical(): void;
            public setX(): void;
            public setY(): void;
        }
    }
}