/**
 * Format a JSON string as a JavaScript value
 *
 * @example
 *     formatJsonAsPOJO('{"a":"text", "b": 15"})
 *     // => '{\n    a: 'text',\n    b: 15\n}'
 */
export declare function formatJsonAsPOJO(json: string, indentation?: string): string;
/**
 * Format a value as its JavaScript representation.
 *
 * Not safe to use on cyclic objects.
 *
 * @example
 *     formatJsonAsPOJO('{"a":"text", "b": 15"})
 *     // => '{\n    a: 'text',\n    b: 15\n}'
 */
export declare function formatValueAsPOJO(value: any, indentation?: string): string;
/**
 * Formats a string as a JavaScript object key, returns non-key-safe values as a string.
 *
 * @example
 *     "abc" => "abc"
 *     "some key" => "'some key'"
 *     "a.b" => "'a.b'"
 */
export declare function formatAsObjectKey(key: string): string;