export interface Args {
    timestamp?: string;
    flowId?: string;
}
/**
 * Constructs a message formatted for consumption by TeamCity.
 */
export declare class Message {
    static flowId: number;
    type: string;
    single: boolean;
    args: Record<string, unknown> | string | number;
    constructor(type: string, args?: unknown);
    /**
     * Add a keyword argument to the message.
     */
    arg(key: string, value: unknown): this;
    /**
     * Escape a string for TeamCity output.
     * @see https://www.jetbrains.com/help/teamcity/service-messages.html
     */
    escape(str?: unknown): string;
    /**
     * Format keyword arguments for use in a message.
     */
    formatArgs(): string;
    /**
     * Format the message as a string.
     */
    toString(): string;
}