import type { Graph } from "../../graph/graph.js";
import { D3DagLayout, type D3DagLayoutProps } from "./d3-dag-layout.js";
export type CollapsableD3DagLayoutProps = D3DagLayoutProps & {
    /** Whether to collapse linear chains of nodes into a single representative. */
    collapseLinearChains?: boolean;
};
export declare class CollapsableD3DagLayout extends D3DagLayout<CollapsableD3DagLayoutProps> {
    static defaultProps: Required<CollapsableD3DagLayoutProps>;
    private _chainDescriptors;
    private _nodeToChainId;
    private _collapsedChainState;
    private _hiddenNodeIds;
    constructor(props?: CollapsableD3DagLayoutProps);
    setProps(props: Partial<CollapsableD3DagLayoutProps>): void;
    updateGraph(graph: Graph): void;
    toggleCollapsedChain(chainId: string): void;
    setCollapsedChains(chainIds: Iterable<string>): void;
    protected _refreshCollapsedChains(): void;
    protected _updateCollapsedChainNodeMetadata(): void;
    protected _shouldSkipNode(nodeId: string | number): boolean;
    protected _mapNodeId(nodeId: string | number): string | number;
    private _createChainId;
    private _isChainCollapsed;
}
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