import { SankeyNode, SankeyLink } from 'd3-sankey';
export interface NodeExtra {
    /**
     * ID of the node. If not provided, the node's index will be used.
     */
    id?: string;
    /**
     * Title of the node.
     */
    title: string;
    /**
     * Color of the node.
     */
    color?: string;
}
export interface LinkExtra {
    /**
     * Color of the link.
     */
    color?: string;
}
export declare type SankeyNodeExtra = SankeyNode<NodeExtra, LinkExtra>;
export declare type SankeyLinkExtra = SankeyLink<NodeExtra, LinkExtra>;
export declare const DEFAULT_COLOR = "rgba(255, 255, 255, 0.2)";