import { EventStream, EventStreamSeed, ObservableSeed, Property, PropertySeed } from "./abstractions";
export declare type LogResult<O> = O extends Property<infer A> ? Property<A> : O extends PropertySeed<infer A> ? PropertySeed<A> : O extends EventStream<infer A> ? EventStream<A> : O extends EventStreamSeed<infer A> ? EventStreamSeed<A> : never;
export interface LogOp {
    <O extends ObservableSeed<any, any, any>>(o: O): LogResult<O>;
}
export declare function log(...prefixes: any[]): LogOp;