import{Observable}from'../Observable';import{MonoTypeOperatorFunction}from'../types';/** @deprecated In future versions, empty notifiers will no longer re-emit the source value on the output observable. */exportdeclarefunctiondelayWhen<T>(delayDurationSelector:(value:T,index:number)=>Observable<never>,subscriptionDelay?:Observable<any>):MonoTypeOperatorFunction<T>;exportdeclarefunctiondelayWhen<T>(delayDurationSelector:(value:T,index:number)=>Observable<any>,subscriptionDelay?:Observable<any>):MonoTypeOperatorFunction<T>;