import { PropertyImpl } from "../interfaces/impl";
import { Property } from "./property";
import { PeriodValue } from "../values/period";
import { TextValue } from "../values/text";
export declare class FreeBusy extends Property implements PropertyImpl<PeriodValue[]> {
    type: string;
    value: PeriodValue[];
    parameters: {
        FBType: TextValue | null;
    };
    setValue(value: string): this;
    setParameter(type: string, value: string): this;
    toString(): string;
}