import type { compareFn, mapFn } from './_types';
/**
 * Finds first index of a subsequence.
 * @param x an array
 * @param y subsequence?
 * @param fc compare function (a, b)
 * @param fm map function (v, i, x)
 */
declare function searchSubsequence<T, U = T>(x: Iterable<T>, y: Iterable<T>, fc?: compareFn<T | U>, fm?: mapFn<T, T | U>): number;
export default searchSubsequence;
//# sourceMappingURL=searchSubsequence.d.ts.map