import type { RunnableInterface, RunnableIOSchema, Node, Edge } from "./types.js";
export { Node, Edge };
export declare class Graph {
    nodes: Record<string, Node>;
    edges: Edge[];
    constructor(params?: {
        nodes: Record<string, Node>;
        edges: Edge[];
    });
    toJSON(): Record<string, any>;
    addNode(data: RunnableInterface | RunnableIOSchema, id?: string, metadata?: Record<string, any>): Node;
    removeNode(node: Node): void;
    addEdge(source: Node, target: Node, data?: string, conditional?: boolean): Edge;
    firstNode(): Node | undefined;
    lastNode(): Node | undefined;
    /**
     * Add all nodes and edges from another graph.
     * Note this doesn't check for duplicates, nor does it connect the graphs.
     */
    extend(graph: Graph, prefix?: string): ({
        id: string;
        data: RunnableIOSchema | RunnableInterface<any, any, import("./types.js").RunnableConfig<Record<string, any>>>;
    } | undefined)[];
    trimFirstNode(): void;
    trimLastNode(): void;
    /**
     * Return a new graph with all nodes re-identified,
     * using their unique, readable names where possible.
     */
    reid(): Graph;
    drawMermaid(params?: {
        withStyles?: boolean;
        curveStyle?: string;
        nodeColors?: Record<string, string>;
        wrapLabelNWords?: number;
    }): string;
    drawMermaidPng(params?: {
        withStyles?: boolean;
        curveStyle?: string;
        nodeColors?: Record<string, string>;
        wrapLabelNWords?: number;
        backgroundColor?: string;
    }): Promise<Blob>;
}