/**
 * Override the default path to load configure files from.
 * Setting a new path will clear all files loaded before. Reload callbacks will no longer work as well.
 * @param filePath - Set configuration file loading path. Set to default if it's undefined.
 * @API
 */
declare function from(filePath?: string): void;
/**
 * Internal API. Not public.
 */
declare function removeWatchers(): void;
/**
 * Register a callback which will be called when the file is reloaded.
 */
declare function register(name: string, onReloaded: () => void): void;
export interface Option {
    /** The default value when configuration item is undefined. */
    default?: any;
    /**
     * Return `undefined` when the configuration item is undefined and has no default value.
     * @default `false`.
     */
    undefinable?: boolean;
}
/**
 * Get a property or sub tree of properties from configure file.
 * Configure file will be loaded if it hasn't been load before.
 * @param file [optional]
 * @param property
 * @param options [optional]
 * @return property value
 * @API
 */
declare function get(property: string, options?: Option): any;
declare function get(file: string, property: string, options?: Option): any;
/**
 * Get the whole property tree from a configure file.
 * Configure file will be loaded if it hasn't been load before.
 * @param file
 * @return property values
 * @deprecated Usually you don't need to use `getAll`, use `get` instead.
 */
declare function getAll(file: string): any;
/**
 * Checks if a configuration can be found in the configuration path
 * @param {String} name - the name of configuration, may contain relative path, extension is optional.
 * @return true if file exists, false it doesn't
 */
declare function exists(name: string): boolean;
declare const _default: {
    get: typeof get;
    getAll: typeof getAll;
    from: typeof from;
    register: typeof register;
    exists: typeof exists;
    removeWatchers: typeof removeWatchers;
};
export default _default;