/**
 * Implement a class implementing this interface to use your own logger.
 * As this is also implemented by log4js, you can directly inject your log4js setup.
 */
export interface LoggerProvider {
    getLogger(categoryName?: string): Logger;
}
export interface Logger {
    level: unknown;
    isLevelEnabled(level?: string): boolean;
    isTraceEnabled(): boolean;
    isDebugEnabled(): boolean;
    isInfoEnabled(): boolean;
    isWarnEnabled(): boolean;
    isErrorEnabled(): boolean;
    isFatalEnabled(): boolean;
    trace(message: string, ...args: any[]): void;
    debug(message: string, ...args: any[]): void;
    info(message: string, ...args: any[]): void;
    warn(message: string, ...args: any[]): void;
    error(message: string, ...args: any[]): void;
    fatal(message: string, ...args: any[]): void;
}
export declare class ConsoleLoggerProvider implements LoggerProvider {
    private prefix?;
    constructor(prefix?: string | undefined);
    getLogger(categoryName?: string | undefined): Logger;
}
export declare class ConsoleLogger implements Logger {
    private prefix?;
    constructor(prefix?: string | undefined);
    private _log;
    trace: (message: string, ...args: any[]) => void;
    debug: (message: string, ...args: any[]) => void;
    info: (message: string, ...args: any[]) => void;
    warn: (message: string, ...args: any[]) => void;
    error: (message: string, ...args: any[]) => void;
    fatal: (message: string, ...args: any[]) => void;
    level: string;
    isLevelEnabled: () => boolean;
    isTraceEnabled: () => boolean;
    isDebugEnabled: () => boolean;
    isInfoEnabled: () => boolean;
    isWarnEnabled: () => boolean;
    isErrorEnabled: () => boolean;
    isFatalEnabled: () => boolean;
}
export declare const DEFAULT_LOGGER_PROVIDER: ConsoleLoggerProvider;