/**
 * A helper object that can be used to create a configuration for a JSON data source item.
 */
export declare class RVJsonSchemaConfigBuilder {
    _columnsConfig: Array<any>;
    _iterationDepth: number;
    constructor();
    setIterationDepth(v: number): RVJsonSchemaConfigBuilder;
    addStringField(key: string): RVJsonSchemaConfigBuilder;
    addNumericField(key: string): RVJsonSchemaConfigBuilder;
    addDateField(key: string, dateFormat: string): RVJsonSchemaConfigBuilder;
    addDateTimeField(key: string, dateFormat: string): RVJsonSchemaConfigBuilder;
    build(): string;
    /** @hidden */
    static _createColumnConfig(type: number, key: string): any;
    /** @hidden */
    static _createDateBasedColumnConfig(type: number, key: string, dateFormat: string): any;
}