import { ComponentRef, ApplicationRef } from "@angular/core";
export declare class StringUtils {
    static format(str: string, ...values: (string | number)[]): string;
    static urlFormat(str: string, ...values: any[]): string;
}
export declare class DateUtils {
    static getNumberOfDays(year: number, month: number): number;
    static getFormattedTime(date: Date, onlyDate?: boolean): string;
    static addZeroIfNeeded(num: number): string;
}
export declare class ElementUtils {
    static getComponentRootNode(componentRef: ComponentRef<any>): HTMLElement;
    static getRootNode(applicationRef: ApplicationRef): HTMLElement;
    static getWordLength(word: string, extraStyle: {
        [key: string]: string;
    }): number;
}
export declare class NumberUtils {
    static convertNumber(num: number): string | number;
}
export declare class CsvUtils {
    static getCsvLine(arr: (string | number)[]): string;
}
export declare class OperationUtils {
    static isEqual(a: any, b: any): boolean;
}
export declare class JsonUtils {
    static TAB: string;
    static ProcessObject(obj: any, indent: any, addComma: any, isArray: any, isPropertyContent: any): string;
    static FormatLiteral(literal: any, quote: any, comma: any, indent: any, isArray: any, style: any): string;
    static GetRow(indent: any, data: any, isPropertyContent?: any): string;
    static FormatFunction(indent: any, obj: any): string;
    static IsArray(obj: any): boolean;
}