import { IElement, ICoding, IQuantity, IReference } from 'fhirtypes/dist/r4';
import { IQuestionnaireEnableWhen, IOperationOutcome } from 'fhirtypes/dist/r4';
import { BackboneElement, IValidatable, ISerializable } from '../base';
import { QuestionnaireEnableOperatorType } from 'fhirtypes/dist/r4/types';
/**
  * @version R4 (v4.0.1)
  * @summary FHIR® Specification by HL7®
  * @description Class for QuestionnaireEnableWhen BackboneElement
  undefined
  * @property {string} question
  * @property {IElement} _question
  * @property {string} operator
  * @property {IElement} _operator
  * @property {boolean} answerBoolean
  * @property {IElement} _answerBoolean
  * @property {number} answerDecimal
  * @property {IElement} _answerDecimal
  * @property {number} answerInteger
  * @property {IElement} _answerInteger
  * @property {string} answerDate
  * @property {IElement} _answerDate
  * @property {string} answerDateTime
  * @property {IElement} _answerDateTime
  * @property {string} answerTime
  * @property {IElement} _answerTime
  * @property {string} answerString
  * @property {IElement} _answerString
  * @property {ICoding} answerCoding
  * @property {IQuantity} answerQuantity
  * @property {IReference} answerReference
  * @author Roberto Araneda Espinoza
  */
export declare class QuestionnaireEnableWhen extends BackboneElement implements IQuestionnaireEnableWhen, IValidatable, ISerializable {
    /**
     * @description The linkId for the question whose answer (or lack of answer) governs whether this item is enabled.
     */
    question: string;
    /**
     * @description Extensions for question
     */
    _question?: IElement;
    /**
     * @description Specifies the criteria by which the question is enabled.
     */
    operator: QuestionnaireEnableOperatorType;
    /**
     * @description Extensions for operator
     */
    _operator?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerBoolean?: boolean;
    /**
     * @description Extensions for answerBoolean
     */
    _answerBoolean?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerDecimal?: number;
    /**
     * @description Extensions for answerDecimal
     */
    _answerDecimal?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerInteger?: number;
    /**
     * @description Extensions for answerInteger
     */
    _answerInteger?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerDate?: string;
    /**
     * @description Extensions for answerDate
     */
    _answerDate?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerDateTime?: string;
    /**
     * @description Extensions for answerDateTime
     */
    _answerDateTime?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerTime?: string;
    /**
     * @description Extensions for answerTime
     */
    _answerTime?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerString?: string;
    /**
     * @description Extensions for answerString
     */
    _answerString?: IElement;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerCoding?: ICoding;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerQuantity?: IQuantity;
    /**
     * @description A value that the referenced question is tested using the specified operator in order for the item to be enabled.
     */
    answerReference?: IReference;
    /**
     * @description Returns a JSON representation of the model
     * @returns {Record<string, any>}
     */
    toJson(): Record<string, any>;
    /**
     * @description Returns a string representation of the model
     * @returns {string}
     */
    toString(): string;
    /**
     * @description Returns a pretty string representation of the model
     * @returns {string}
     */
    toPrettyString(): string;
    /**
     * @description Returns a serialized string representation of the model
     * @returns {string}
     */
    serialize(): string;
    /**
     * @description Validates the model
     * @returns {isValid: boolean, operationOutcome: IOperationOutcome}
     */
    validate(): {
        isValid: boolean;
        operationOutcome: IOperationOutcome;
    };
    constructor(args?: IQuestionnaireEnableWhen);
}