import { Observable, Subject } from 'rxjs';
/** Writes serialized log (e.g. json) to the target (e.g. stdout) */
export interface Target {
    name: string;
    write: (serializedData: any) => void;
}
/** Standard targets */
export declare namespace Target {
    const stderr: {
        name: string;
        write(serializedData: string): void;
    };
    const stdout: {
        name: string;
        write(serializedData: string): void;
    };
    /** Creates a target that emits logs as observable events, using a Subject
     * @param name - name of the target. Defaults to 'observable'
     * @param subject - the Subject to use to emit observable events. If not provided, creates a standard Subject. E.g. you can pass a ReplaySubject if you need to replay values with a specific buffer size
     * @param T - the type of serialized data that will be emitted from the Observable
     * @returns object containing the target and the observable the target will emit to */
    function Observable<T = any>(name?: string, subject?: Subject<T>): {
        observable: Observable<T>;
        target: Target;
    };
}