export declare const DEBUG_LEVEL: string;
export declare class LogHandler {
    private logger;
    private static instance;
    private constructor();
    static newInstance(): LogHandler;
    debug(text: string | null | undefined, namespace: string | null | undefined, topic: string | null | undefined): void;
    log(text: string | null | undefined, namespace: string | null | undefined, topic: string | null | undefined): void;
    info(text: string | null | undefined, namespace: string | null | undefined, topic: string | null | undefined): void;
    error(text: string | null | undefined, namespace: string | null | undefined, topic: string | null | undefined): void;
    private buildLogMessage;
}
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