declare namespace Ext {
    export namespace data {
        export namespace writer {
            export interface JsonConfig {
                allDataOptions?: object;
                allowSingle?: boolean;
                clientIdProperty?: string;
                dateFormat?: string;
                encode?: boolean;
                expandData?: boolean;
                nameProperty?: string;
                partialDataOptions?: object;
                rootProperty?: string;
                transform?: object | CallableFunction;
                writeAllFields?: boolean;
                writeRecordId?: boolean;
            }

            export class Json extends Ext.data.writer.Writer  {
                public getAllowSingle(): void;
                public getEncode(): void;
                public getExpandData(): void;
                public getExpandedData(data?: object): void;
                public getRootProperty(): void;
                public setAllowSingle(): void;
                public setEncode(): void;
                public setExpandData(): void;
                public setRootProperty(): void;
            }
        }
    }
}