import { SketchGeometryTypes, SketchCollection } from "../types/index.js";
/**
 * If sketch collection passes sketchTest, then returns new collection
 * with mergeSketchColl sketches appended and updated bbox
 */
export declare function includeVirtualSketch<G extends SketchGeometryTypes>(sketchColl: SketchCollection<G>, mergeSketchColl: SketchCollection<G>, sketchTest: (collection: SketchCollection) => boolean): SketchCollection<G>;
export declare const isTruthyAttributeValue: (value: unknown) => boolean;