import { LogRecord } from './record';
export declare type LogHandler = {
    (logRecord: LogRecord): Promise<void> | void;
};
export declare namespace LogHandler {
    /**
     * Decorate handler where `predicate` is applied on record input.
     * If `false`, the handler is never called
     *
     * @param predicate - the predicate applied on log record
     */
    function filter(predicate: (record: LogRecord) => boolean): (handler: LogHandler) => LogHandler;
}
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