import { Message, Ros, Topic } from 'roslib';
export interface TopicSettings {
    topic: string;
    messageType: string;
    throttleRate?: number;
    latch?: boolean;
    queueLength?: number;
    queueSize?: number;
}
export type DefaultMessageType = Message;
export declare function getTopic<TMessage = DefaultMessageType>(ros: Ros, partialSettings: TopicSettings): Topic<TMessage>;
export declare function subscribe<TMessage = DefaultMessageType>(ros: Ros, settings: TopicSettings, callback: (message: TMessage) => void): Topic<TMessage>;
export declare function unsubscribe<TMessage = DefaultMessageType>(topic: Topic<TMessage>, callback?: (message: TMessage) => void): void;