import { ICodeableConcept, IReference } from 'fhirtypes/dist/r4';
import { IConditionStage, IOperationOutcome } from 'fhirtypes/dist/r4';
import { BackboneElement, IValidatable, ISerializable } from '../base';
/**
  * @version R4 (v4.0.1)
  * @summary FHIR® Specification by HL7®
  * @description Class for ConditionStage BackboneElement
  undefined
  * @property {ICodeableConcept} summary
  * @property {IReference[]} assessment
  * @property {ICodeableConcept} type
  * @author Roberto Araneda Espinoza
  */
export declare class ConditionStage extends BackboneElement implements IConditionStage, IValidatable, ISerializable {
    /**
     * @description A simple summary of the stage such as "Stage 3". The determination of the stage is disease-specific.
     */
    summary?: ICodeableConcept;
    /**
     * @description Reference to a formal record of the evidence on which the staging assessment is based.
     */
    assessment?: IReference[];
    /**
     * @description The kind of staging, such as pathological or clinical staging.
     */
    type?: ICodeableConcept;
    /**
     * @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?: IConditionStage);
}