import { Document } from '../types/document.types';
import { Message, MessageRole } from '../types/message.types';
import { LlmSpanAllowedInputType, LlmSpanAllowedOutputType, RetrieverSpanAllowedOutputType } from '../types/logging/step.types';
/**
 * Attempt to convert an object to a Message, or return null if not possible
 */
export declare const convertToMessage: (obj: string | Date | Record<string, string> | Message, defaultRole?: MessageRole) => Message;
export declare const convertLlmInput: (value: LlmSpanAllowedInputType, defaultRole?: MessageRole) => Message[];
export declare const convertLlmOutput: (value: LlmSpanAllowedOutputType, defaultRole?: MessageRole) => Message;
export declare const tryConvertToDocument: (value: object) => Document | null;
export declare const convertRetrieverOutput: (value: RetrieverSpanAllowedOutputType) => Document[];