export type SlotCallback<T> = (data?: T) => void;
export interface Sig<T> {
    onConnect(onConnect: (connNo: number) => void): void;
    onDisconnect(onDisconnect: (connNo: number) => void): void;
    connNo(): number;
    connect(callback: SlotCallback<T>, object?: any): void;
    disconnect(callback: SlotCallback<T>, object?: any): void;
    disconnectAll(): void;
    freeze(): void;
    unfreeze(): void;
}
export declare class Signal<T> implements Sig<T> {
    private _slots;
    private _emit;
    private _onConnect?;
    private _onDisconnect?;
    constructor();
    onConnect(onConnect: (connNo: number) => void): void;
    onDisconnect(onDisconnect: (connNo: number) => void): void;
    connNo(): number;
    connect(callback: (data?: T) => void): void;
    connect(callback: (data?: T) => void, object?: Object): void;
    disconnect(callback: (data?: T) => void, object?: Object): void;
    disconnectAll(): void;
    freeze(): void;
    unfreeze(): void;
    emit(this: Signal<void>): any[];
    emit(this: Signal<T>, data?: T): any[];
}