export declare function expand<T, R>(project: (value: T, index: number) => ObservableInput<R>, concurrent?: number, scheduler?: SchedulerLike): OperatorFunction<T, R>;
export declare function expand<T>(project: (value: T, index: number) => ObservableInput<T>, concurrent?: number, scheduler?: SchedulerLike): MonoTypeOperatorFunction<T>;
export declare class ExpandOperator<T, R> implements Operator<T, R> {
private project;
private concurrent;
export declare function expand<T, R>(project: (value: T, index: number) => ObservableInput<R>, concurrent?: number, scheduler?: SchedulerLike): OperatorFunction<T, R>;
export declare function expand<T>(project: (value: T, index: number) => ObservableInput<T>, concurrent?: number, scheduler?: SchedulerLike): MonoTypeOperatorFunction<T>;
export declare class ExpandOperator<T, R> implements Operator<T, R> {
private project;
private concurrent;