export declare enum TriStateCheckboxState {
    NONE = "NONE",
    SOME = "SOME",
    ALL = "ALL"
}
export interface ITriStateCheckboxControl {
    readValue(): any;
    writeValue(value: any): void;
    setDisabled(state: boolean): void;
}
export interface ITriCheckboxRegister {
    addControl(control: ITriStateCheckboxControl): void;
    removeControl(control: ITriStateCheckboxControl): void;
    changeControlValue(control: ITriStateCheckboxControl, value: any): any;
    getState(): TriStateCheckboxState;
}