import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs to the Buffer activity. This activity makes use of the geometry engine. */
export interface BufferEngineTaskInputs {
    geometry: __esri.GeometryUnion | __esri.GeometryUnion[];
    distance: number | number[];
    unit?: "millimeters" | "centimeters" | "meters" | "kilometers" | "inches" | "feet" | "yards" | "miles" | "nautical-miles" | string;
    geodesic?: boolean;
    union?: boolean;
}
/** Defines outputs for the Buffer activity. */
export interface BufferEngineTaskOutputs {
    /** @description The first buffer or result (or the union result). */
    geometry?: __esri.Polygon;
    /** @description The buffer results. */
    results?: __esri.Polygon[];
}
export declare class BufferEngineTask implements IActivityHandler {
    static readonly action = "gcx:wf:arcgis::BufferEngineTask";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: BufferEngineTaskInputs): Promise<BufferEngineTaskOutputs>;
    private executeUsing;
}