export interface Logger {
    traceEnabled: boolean;
    debugEnabled: boolean;
    trace(message: string): void;
    debug(message: string): void;
    info(message: string): void;
    warn(message: string): void;
    error(error: Error, options?: {
        pad?: boolean;
    }): void;
}
export declare const NullLogger: Logger;
export declare function errorMessage(error: Error): string;
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