import { BasicLogger } from '.';
export declare function trimWhitespace(arg: unknown): unknown;
export declare function isNotEmptyOrLineBreak(arg: unknown): boolean;
export declare function transformValue(arg: unknown): unknown;
export declare function friendlyLogEntry(...args: unknown[]): string;
/**
 * Converts the whole logging entry into a single JSON string which
 * makes this compatible with Docker and allow multiline data like
 * exceptions to be retained within same log entry.
 */
export declare const createContainerFriendlyLogger: () => BasicLogger;