import { Observable } from 'rxjs';
import { MessageClient } from '../message-client';
import { MessageResponse } from '../message-response.type';
import { Message } from '../message.interface';
import { GET_NEW_ID, RESPONSES$, SEND } from '../selectors';
declare const PORT: unique symbol;
export declare class ChromeMessageClient extends MessageClient {
    private static readonly connections;
    [RESPONSES$]: Observable<MessageResponse>;
    private [PORT];
    constructor(name?: string);
    [SEND]<T>(message: Message<T>): void;
    protected [GET_NEW_ID](): string;
}
export {};