declare function choiceTransformationPipeline(result: Array<{
    _id: any;
    count: number;
}>): {
    data: number[][];
    values: string[];
};
declare function numberTransformationPipeline(result: Array<{
    average: number;
    min: number;
    max: number;
    count: number;
}>): {
    data: number[][];
    values: string[];
};
declare function histogramTransformationPipeline(result: Array<{
    count: number;
    label: string;
}>): {
    data: number[][];
    values: string[];
};
declare function groupedTransformationPipeline(result: Array<{
    _id: {
        series: any;
        value: any;
    };
    count: number;
}>): {
    data: any[][];
    values: string[];
    series: string[];
};
export declare const transformers: {
    boolean: typeof choiceTransformationPipeline;
    radiogroup: typeof choiceTransformationPipeline;
    dropdown: typeof choiceTransformationPipeline;
    checkbox: typeof choiceTransformationPipeline;
    tagbox: typeof choiceTransformationPipeline;
    number: typeof numberTransformationPipeline;
    rating: typeof numberTransformationPipeline;
    histogram: typeof histogramTransformationPipeline;
    matrix: typeof groupedTransformationPipeline;
    pivot: typeof groupedTransformationPipeline;
    wordcloud: typeof choiceTransformationPipeline;
};
export {};