import { GoogleAuthOptions } from "google-auth-library";
import { BaseChatGoogleVertexAI, GoogleVertexAIChatInput } from "./common.js";
/**
 * Enables calls to the Google Cloud's Vertex AI API to access
 * Large Language Models in a chat-like fashion.
 *
 * To use, you will need to have one of the following authentication
 * methods in place:
 * - You are logged into an account permitted to the Google Cloud project
 *   using Vertex AI.
 * - You are running this on a machine using a service account permitted to
 *   the Google Cloud project using Vertex AI.
 * - The `GOOGLE_APPLICATION_CREDENTIALS` environment variable is set to the
 *   path of a credentials file for a service account permitted to the
 *   Google Cloud project using Vertex AI.
 * @example
 * ```typescript
 * const model = new ChatGoogleVertexAI({
 *   temperature: 0.7,
 * });
 * const result = await model.invoke("What is the capital of France?");
 * ```
 */
export declare class ChatGoogleVertexAI extends BaseChatGoogleVertexAI<GoogleAuthOptions> {
    static lc_name(): string;
    constructor(fields?: GoogleVertexAIChatInput<GoogleAuthOptions>);
}
export type { ChatExample, GoogleVertexAIChatAuthor, GoogleVertexAIChatInput, GoogleVertexAIChatInstance, GoogleVertexAIChatMessage, GoogleVertexAIChatMessageFields, GoogleVertexAIChatPrediction, } from "./common.js";