import { DataRecord } from '@overture-stack/lectern-dictionary';
/**
 * Find duplicate keys in a dataset.
 * @param datasetKeys Array with the keys to evaluate.
 * @returns An Array with all the values that appear more than once in the dataset.
 */
export declare const findDuplicateKeys: (datasetKeys: [number, DataRecord][]) => [number, DataRecord][];
/**
 * A "select" function that retrieves specific fields from the dataset as a record, as well as the numeric position of each row in the dataset.
 * @param dataset Dataset to select fields from.
 * @param fields Array with names of the fields to select.
 * @returns An array of tuples tuple where the first element is the index of the row in the dataset, and the second value is the record with the
 * selected values.
 */
export declare const selectFieldsFromDataset: (dataset: DataRecord[], fields: string[]) => [number, DataRecord][];