export type LANGCHAIN_NODE_TYPE = 'agent' | 'chain' | 'chat' | 'llm' | 'retriever' | 'tool';
/**
 * A node in the LangChain trace.
 */
export declare class Node {
    nodeType: LANGCHAIN_NODE_TYPE;
    spanParams: Record<string, any>;
    runId: string;
    parentRunId?: string;
    children: string[];
    constructor(nodeType: LANGCHAIN_NODE_TYPE, spanParams: Record<string, any>, runId: string, parentRunId?: string);
}