import { LogLevel } from "./LogFilter";
import type { ILogger, ILogItem, ILogReporter, LabelOrValues, LogCallback, LogItemValues } from "./types";
export declare class NullLogger implements ILogger {
    readonly item: ILogItem;
    log(labelOrValues: LabelOrValues): ILogItem;
    addReporter(): void;
    get reporters(): ReadonlyArray<ILogReporter>;
    getOpenRootItems(): Iterable<ILogItem>;
    forceFinish(): void;
    child(labelOrValues: LabelOrValues): ILogItem;
    run<T>(_: any, callback: LogCallback<T>): T;
    wrapOrRun<T>(item: ILogItem | undefined, _: any, callback: LogCallback<T>): T;
    runDetached(_: any, callback: any): ILogItem;
    get level(): typeof LogLevel;
}
export declare class NullLogItem implements ILogItem {
    readonly logger: NullLogger;
    readonly logLevel: LogLevel;
    children?: Array<ILogItem>;
    values: LogItemValues;
    error?: Error;
    constructor(logger: NullLogger);
    discard(): void;
    wrap<T>(_: LabelOrValues, callback: LogCallback<T>): T;
    run<T>(callback: LogCallback<T>): T;
    log(labelOrValues: LabelOrValues): ILogItem;
    set(labelOrValues: LabelOrValues): ILogItem;
    runDetached(_: LabelOrValues, callback: LogCallback<unknown>): ILogItem;
    wrapDetached(_: LabelOrValues, _callback: LogCallback<unknown>): void;
    refDetached(): void;
    ensureRefId(): void;
    get level(): typeof LogLevel;
    get duration(): 0;
    catch(err: Error): Error;
    child(): ILogItem;
    finish(): void;
    forceFinish(): void;
    serialize(): undefined;
}
export declare const Instance: NullLogger;