export declare class NbFormControlComponent {
    _hasFeedback: boolean;
    _nbFormItemControlWrapper: boolean;
    nbHasFeedback: boolean | string;
    nbValidateStatus: any;
    nbRequired: any;
    readonly isError: boolean;
    readonly isSuccess: boolean;
    readonly hasFeedBack: boolean;
    _isDirtyAndError(name: any): any;
    constructor();
}
