import { EnvConfigSettings } from '../types';
import { ConfigSettingsBuilderOptions } from './types';
export declare class SettingsFileLoader<TSettings extends {} = {}> {
    private get loaderFactories();
    get supportedFileExtensions(): string[];
    static initBabel: () => void;
    private static _isInitBabel;
    private _loaderFactories;
    private _options;
    constructor(options?: ConfigSettingsBuilderOptions);
    getSupportedExistingFile: (rootDir: string, baseName: string, extentions?: string[]) => string;
    tryLoad: <T = TSettings | EnvConfigSettings<TSettings>>(rootDir: string, baseName: string, extentions?: string[]) => Promise<T>;
    load: <T = TSettings | EnvConfigSettings<TSettings>>(filePath: string) => Promise<T>;
    private loadSettingsFromJson;
    private loadSettingsFromTsOrJS;
    private loadSettingsFromYaml;
    private filterSupportedExtension;
    private loadWithFactory;
}