import type { IActivityHandler } from "../../IActivityHandler";
/** Defines inputs for the NearestVertices activity. This activity relies on the geometry engine. */
export interface NearestVerticesEngineTaskInputs {
    geometry: __esri.GeometryUnion;
    point: __esri.Point;
    proximity?: number;
    maxVertices?: number;
}
export interface NearestVertex {
    /** @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;
}
/** Defines outputs for the NearestVertices activity. */
export interface NearestVerticesEngineTaskOutputs {
    /** @description The results. */
    results?: NearestVertex[];
}
export declare class NearestVerticesEngineTask implements IActivityHandler {
    static readonly action = "gcx:wf:arcgis::NearestVerticesEngineTask";
    static readonly suite = "gcx:wf:builtin";
    execute(inputs: NearestVerticesEngineTaskInputs): NearestVerticesEngineTaskOutputs;
}