import { type OperatorFunction } from 'rxjs';
/**
 * Counts how many times the source observable emits.
 * @since 1.0.0
 * @kind Operator
 * @param emitInitialZero If set to true, it will immediately emit 0 when subscribed to
 * @example
 * import {of} from 'rxjs';
 * import {countEmissions} from '@aloreljs/rxutils/operators';
 *
 * of('foo', 'bar', 'qux')
 *   .pipe(countEmissions())
 *   .subscribe() // emits 1, then 2, then 3 and completes
 */
export declare function countEmissions(emitInitialZero?: boolean): OperatorFunction<any, number>;