export type LogArgs = [msg: string] | [obj: Record<string, unknown>, msg?: string] | [err: Error, msg?: string];
export type LogFn = (...args: LogArgs) => void;
export type Logger = Record<"trace" | "debug" | "info" | "warn" | "error", LogFn>;
export type LogLevel = "trace" | "debug" | "info" | "warn" | "error" | "silent";
export type LoggerConfig = {
    level?: LogLevel;
};
export declare let logger: Logger;
export declare const isLogger: (input: Logger | LoggerConfig) => input is Logger;
export declare function isLoggerDisabled(input?: Logger | LoggerConfig | null): boolean;
export declare function setLoggerInstance(next: Logger): void;