import type { IResettableModel, ILabel, IValueModel } from '@zajno/common/models/types';
export interface IFlagModel extends IValueModel<boolean>, IResettableModel {
    toggle: () => void;
    setTrue: () => boolean | void;
    setFalse: () => boolean | void;
}
export type IFlagModelReadonly = {
    readonly value: boolean;
};
export type ILabeledFlagModel = IFlagModel & ILabel<string>;
export declare class FlagModel implements IFlagModel, IFlagModelReadonly {
    private _value;
    constructor(initial?: boolean);
    get value(): boolean;
    set value(value: boolean);
    /** override me to spy.
     *
     * WARNING: use `bind` to use as callback to preserve `this` context. Otherwise, use `onChange` method
     */
    setValue(value: boolean): void;
    get isDefault(): boolean;
    /** @returns whether the value has changed */
    setTrue: () => boolean;
    /** @returns whether the value has changed */
    setFalse: () => boolean;
    /** Possible issue: if this method is used in trackable context (e.g. autorun), it might lead to an infinite loop  */
    toggle: () => void;
    /** just sets input value, useful as a callback */
    onChange: (value: boolean) => void;
    reset: () => void;
}