import { LogLevel } from "./config/LogLevel";
import { LogMetadata } from "./config/LogMetadata";
import { LogEngine } from "./LogEngine";
import { Properties } from "./Properties";
import { UniverseLog } from "./UniverseLog";
/**
 * Logging levels conforms NPM logging levels
 */
export declare abstract class AbstractUniverseLog implements UniverseLog {
    private logEngine;
    constructor(propsOrEngine: Properties | LogEngine);
    getLevel(): LogLevel;
    getFormatName(): string;
    getMetadata(): LogMetadata;
    isDebug(): boolean;
    error(...msg: any[]): void;
    errorGen(genFn: () => any[]): void;
    warn(...msg: any[]): void;
    warnGen(genFn: () => any[]): void;
    info(...msg: any[]): void;
    infoGen(genFn: () => any[]): void;
    http(...msg: any[]): void;
    httpGen(genFn: () => any[]): void;
    verbose(...msg: any[]): void;
    verboseGen(genFn: () => any[]): void;
    debug(...msg: any[]): void;
    debugGen(genFn: () => any[]): void;
    silly(...msg: any[]): void;
    sillyGen(genFn: () => any[]): void;
    /**
     * Calls generator fn only if logging level is reached.
     */
    doEfficientLog(level: LogLevel, msgGeneratorFn: () => any[]): void;
    doLog(level: LogLevel, ...msgsObjs: any[]): void;
    protected getEngine(): LogEngine;
}