export declare const textOf: (node?: Element | null) => string;
export declare const textFrom: (root: ParentNode | null, selector: string) => string;
export declare abstract class DataCrawler<T> {
    ['constructor']: typeof DataCrawler;
    static baseURI: string;
    static schema: URLPattern;
    abstract getList(URI: string): AsyncGenerator<T>;
    abstract getItem(URI: string): Promise<T>;
    makeYAML(list: T[]): string;
    saveList(URI: string): Promise<{
        list: T[];
        folder: string;
        file: string;
    }>;
}