import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs to the Union activity. This activity makes use of the geometry engine.
    This activity constructs the set- theoretic union of the geometries in the input array.All inputs must be of the same type. */
export interface UnionEngineTaskInputs {
    geometry1: __esri.GeometryUnion | __esri.GeometryUnion[];
    geometry2: __esri.GeometryUnion | __esri.GeometryUnion[];
}
/** Defines outputs to the Union activity. */
export interface UnionEngineTaskOutputs {
    /** @description The unioned geometry result. */
    geometry: __esri.Geometry | null | undefined;
}
export declare class UnionEngineTask implements IActivityHandler {
    static readonly action = "gcx:wf:arcgis::UnionEngineTask";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: UnionEngineTaskInputs): UnionEngineTaskOutputs;
}