export declare enum Level {
    ERROR = -2,
    WARN = -1,
    QUIET = 0,
    INFO = 1,
    VERBOSE = 2
}
export declare const LEVEL_INFO: number;
export declare const LEVEL_VERBOSE: number;
export declare function current(): Level;
export declare function configure({ level: newLevel, prefix: newPrefix }: {
    level: Level;
    prefix?: string;
}): void;
export declare function warn(fmt: string, ...args: any[]): void;
export declare function error(fmt: string, ...args: any[]): void;
export declare function info(fmt: string, ...args: any[]): void;
export declare function debug(fmt: string, ...args: any[]): void;
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