import * as i0 from "@angular/core";
export declare class StringService {
    isNullOrWhitespace(str: string): boolean;
    /**
     * Pre format the comment when truncated to 100 characters
     * for toasters
     */
    getFormattedTruncatedComment(comment: string): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<StringService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<StringService>;
}