import { Parser } from 'csv-parse';
export type Maybe<T> = T | undefined;
/**
 * Generates a simple hash from an array of numeric IDs.
 *
 * This function computes a hash for a given array of numbers by iterating over each
 * ID and applying bitwise operations to accumulate a hash value.
 * The final hash is then converted to a base-36 string.
 *
 * @param ids - The array of numeric IDs to hash.
 * @returns A hashed string representation of the input array.
 */
export declare const hashIds: (ids: number[]) => string;
/**
 * Parses a CSV stream with a sensible configuration for GTFS feeds.
 *
 * @param stream The CSV stream.
 * @returns A parser from the csv-parse library.
 */
export declare const parseCsv: (stream: NodeJS.ReadableStream) => Parser;