import { type Provider } from 'nconf';
import { Injectable } from '../model/injectable';
import { Resolver } from '../model/resolver';
import { Scope } from '../model/scope';
/**
 * Collection of utility functions
 * @typedef Helper
 * @public
 */
export declare abstract class Helper {
    private static readonly supportedInjectableTypeNames;
    /**
     * Load all the source files found starting form the provided root directory.
     * @param {String} dir the directly to scan for source files
     * @returns {Generator<String>}
     *
     * @public
     * @static
     */
    static loadSources(dir: string): string[];
    /**
     * Find a source file starting from the requested directory.
     * @param {String} dir the start directory for the search
     * @param {String} name the name of the file source to find
     */
    static findSource(dir: string, name: string): string;
    /**
     * Allows to retrieve a variable from the configuration or as environment variable, supports
     * both `:` and `_` notation.
     * @param {Environment} environment the configuration container
     * @param {string} key the key for the variable to retrieve
     * @param {any} _default the default value if the variable is nt defined.
     */
    static getVariable(environment: Provider, key: string, _default: any): any;
    static getContextRoot(config: any): string;
    static isPath(_string: string): boolean;
    static fileNameFromPath(_path: string): string;
    /**
     * Convert the required scope to Scope
     * @param {String|Scope} scope the scope required for the component
     * @returns {Scope}
     *
     * @static
     * @public
     */
    static asLifetime(scope: Scope | string | undefined): Scope;
    /**
     * Convert the required resolver to Resolver
     * @param {String|Resolver} resolver the resolver required for the component
     * @returns {Resolver}
     *
     * @static
     * @public
     */
    static asResolver(resolver: Resolver | string | undefined): Resolver;
    static isInjectable(obj: any): boolean;
    static isConfiguration(obj: Injectable): boolean;
    /**
     * Imports all modules declared as part of the specified path
     * @param {string} path the module path
     * @returns Array<Injectable>
     *
     * @public
     * @static
     */
    static dynamicallyImport(path: string): Promise<Injectable[]>;
}