import type { MonoTypeOperatorFunction } from 'rxjs';
/**
 * Similar to <code>tap({complete: ...})</code>, but passes on the last emitted value to the callback
 * @param tapFn The callback function
 * @param thisArg An optional thisArg
 * @since 2.1.0
 * @kind Operator
 * @see https://rxjs.dev/api/operators/tap
 * @example
 * import {of} from 'rxjs';
 * import {tapLast} from '@aloreljs/rxutils/operators';
 *
 * of('foo', 'bar', 'qux')
 *   .pipe(
 *     tapLast(v => console.debug('tap', v))
 *   )
 *   .subscribe(v => {
 *     console.debug('subscribe', v);
 *   });
 * // Logs "subscribe foo", "subscribe bar", "subscribe qux", "tap qux"
 */
export declare function tapLast<T>(tapFn: (value?: T) => void, thisArg?: any): MonoTypeOperatorFunction<T>;