import { type TokenManager } from '../google/client.ts';
export declare function sendMessage(tokenManager: TokenManager, to: string, subject: string, body: string): Promise<unknown>;
export declare function replyMessage(tokenManager: TokenManager, messageId: string, body: string): Promise<unknown>;
export declare function replyAllMessage(tokenManager: TokenManager, messageId: string, body: string): Promise<unknown>;
export declare function forwardMessage(tokenManager: TokenManager, messageId: string, to: string): Promise<unknown>;
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