import { ICodeableConcept, IElement, IRepeat, ITiming } from 'fhirtypes/dist/r4';
import { TimingBuilder } from '../../builders';
import { BackboneElement, IValidatable, ISerializable } from '../base';
export declare class Timing extends BackboneElement implements ITiming, IValidatable, ISerializable {
    /**
     * @description Identifies specific times when the event occurs.
     */
    event?: string[];
    /**
     * @description A set of rules that describe when the event is scheduled.
     */
    repeat?: IRepeat;
    /**
     * @description A code for the timing schedule (or just text in code.text).
     */
    code?: ICodeableConcept;
    /**
     * @description Extensions for event
     */
    _event?: IElement[];
    toJson(): any;
    toPrettyString(): string;
    toString(): string;
    validate(): {
        isValid: boolean;
        operationOutcome: import("fhirtypes/dist/r4").IOperationOutcome;
    };
    constructor(args?: ITiming);
    protected builderInstance(): TimingBuilder;
    serialize(): string;
}