/**
 * Value Object: LogLevel
 * Represents a log level with validation
 */
export type LogLevel = 'debug' | 'info' | 'warn' | 'error' | 'fatal';
export declare class LogLevelVO {
    readonly value: LogLevel;
    private static readonly VALID_LEVELS;
    private static readonly LEVEL_PRIORITY;
    constructor(value: LogLevel);
    static isValid(level: string): level is LogLevel;
    static fromString(level: string): LogLevelVO;
    compareTo(other: LogLevelVO): number;
    isGreaterThanOrEqual(other: LogLevelVO): boolean;
    equals(other: LogLevelVO): boolean;
    toString(): string;
}
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