import type { Types } from '@cornerstonejs/core';
export type ImageSliceViewport = Types.IViewport & {
    getCurrentImageId(): string | undefined;
    getCurrentImageIdIndex(): number;
    getImageIds(): string[];
    hasImageURI(imageURI: string): boolean;
};
export type StackCompatibilityViewport = ImageSliceViewport & {
    setStack(imageIds: string[], currentImageIdIndex?: number): Promise<string> | string;
};
export type StackCalibrationViewport = ImageSliceViewport & {
    calibrateSpacing(imageId: string): void;
};
export declare function viewportSupportsImageSlices(viewport: unknown): viewport is ImageSliceViewport;
export declare function viewportSupportsStackCompatibility(viewport: unknown): viewport is StackCompatibilityViewport;
export declare function viewportSupportsStackCalibration(viewport: unknown): viewport is StackCalibrationViewport;