/**
 * Waterfall chart scene builder.
 *
 * Builds cumulative delta bars from time-series data. Each bar's base starts
 * where the previous bar ended. Positive/negative deltas get distinct colors.
 *
 * Dependencies: SceneGraph (buildRectNode)
 * Consumed by: PipelineStore.buildSceneNodes (chartType "waterfall")
 */
import type { Datum } from "../../charts/shared/datumTypes";
import type { SceneNode, StreamLayout } from "../types";
import type { XYSceneContext } from "./types";
export declare function buildWaterfallScene(ctx: XYSceneContext, data: Datum[], layout: StreamLayout): SceneNode[];
