/**
 * Applies the given selector to elements in the given array until a value is produced that is neither `null` nor `undefined` and returns that value
 * Returns `undefined` if no such value is produced
 *
 * Example:
 *
 * ```ts
 * import { firstNotNullishOf } from "https://deno.land/std@$STD_VERSION/collections/mod.ts";
 * import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts";
 *
 * const tables = [
 *     { number: 11, order: null },
 *     { number: 12, order: 'Soup' },
 *     { number: 13, order: 'Salad' },
 * ]
 * const nextOrder = firstNotNullishOf(tables, it => it.order)
 *
 * assertEquals(nextOrder, 'Soup')
 * ```
 */
export declare function firstNotNullishOf<T, O>(array: readonly T[], selector: (item: T) => O | undefined | null): NonNullable<O> | undefined;