import { Message } from '../Message.js';
import { ClientId } from './ClientId.js';
import { SessionConnection } from './SessionConnection.js';
export declare class SessionClients<ServerMessage extends Message<any, any>, ClientMessage extends Message<any, any>> {
    private readonly clients;
    get(id: ClientId): SessionConnection<ServerMessage, ClientMessage> | null;
    /**
     * Ids are issued here and nowhere else. `add` used to accept one, which is how
     * a client could pick its own session id: `SessionServer` passed straight
     * through whatever arrived on the wire.
     */
    add(): SessionConnection<ServerMessage, ClientMessage>;
    remove(id: ClientId): boolean;
}
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