import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs to the NearestVertex activity. This activity relies on the geometry engine. */
export interface NearestVertexEngineTaskInputs {
    geometry: __esri.GeometryUnion;
    point: __esri.Point;
}
/** Defines outputs to the NearestCoordinateOrVertex activity. */
export interface NearestVertexEngineTaskOutputs {
    /** @description The distance to the point. */
    distance: number;
    /** @description Whether the result is empty. */
    empty: boolean;
    /** @description The index of the vertex. */
    index: number;
    /** @description The result point. */
    point: __esri.Point;
    /** @description Whether the point is on the left or right of the line-segment. */
    side?: "left" | "right" | string;
}
export declare class NearestVertexEngineTask implements IActivityHandler {
    static readonly action = "gcx:wf:arcgis::NearestVertexEngineTask";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: NearestVertexEngineTaskInputs): NearestVertexEngineTaskOutputs;
}