export declare const logLevelObject: {
    error: string;
    warn: string;
    info: string;
    verbose: string;
    silly: string;
};
export declare type LogLevels = keyof typeof logLevelObject;
export declare function isCorrectLogLevel(logLevel: string): logLevel is LogLevels;
export declare function setLogLevel(newLogLevel: LogLevels): void;
export interface Logger {
    silly(...args: any[]): void;
    verbose(...args: any[]): void;
    info(...args: any[]): void;
    warn(...args: any[]): void;
    error(...args: any[]): void;
    profile(marker: string, ...args: any[]): number | void;
}
export declare const logger: Logger;
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