/**
 * Class {@link TransformUtil} encapsulate utility for transforming data from one format to another.
 */
export default abstract class TransformUtil {
    /**
     * Groups an array of objects by the specified key.
     *
     * @template T The type of the objects in the array.
     * @param array The array of objects to be grouped.
     * @param key The key of the object by which to group the array.
     * @returns A record where each key is a distinct value from the specified key in the objects, and the value is an array of objects that share that key.
     */
    static groupBy<T>(array: T[], key: keyof T): Record<string, T[]>;
    /**
     * Transforms an array of data into a two-dimensional array of rows and columns. The length of the sub-arrays will be the specified number of columns.
     * @param data The array of data to be transformed.
     * @param columns The number of columns to be created in the two-dimensional array.
     * @returns A two-dimensional array of rows and columns, where each sub-array is of the specified length.
     */
    static transformArrayToColumns(data: Array<any>, columns: number): any[];
}