import { IAttachment, IElement } from 'fhirtypes/dist/r4';
import { AttachmentBuilder } from '../../builders';
import { Element } from '../base/Element';
import { IValidatable } from '../base/IValidatable';
import { ISerializable } from '../base/ISerializable';
export declare class Attachment extends Element implements IAttachment, IValidatable, ISerializable {
    contentType?: string;
    data?: string;
    language?: string;
    url?: string;
    size?: number;
    hash?: string;
    title?: string;
    creation?: string;
    _contentType?: IElement;
    _creation?: IElement;
    _data?: IElement;
    _hash?: IElement;
    _language?: IElement;
    _size?: IElement;
    _title?: IElement;
    _url?: IElement;
    toJson(): any;
    toPrettyString(): string;
    toString(): string;
    validate(): {
        isValid: boolean;
        operationOutcome: import("fhirtypes/dist/r4").IOperationOutcome;
    };
    constructor(args?: IAttachment);
    protected builderInstance(): AttachmentBuilder;
    serialize(): string;
}