export default class Helper {
    /**
     * Check if given date is not null, casts to date format
     * @return YYYY-MM-DD
     */
    static parseDate(date: string): string | null;
    /**
     * Check if given date time is not null, casts to date time format
     * @return YYYY-MM-DD HH:mm:ss
     */
    static parseDateTime(date: string): string | null;
    /**
     * Get current date time
     * @return YYYY-MM-DD HH:mm:ss
     */
    static getCurrentDateTime(): string;
    /**
     * Die and dump
     */
    static dd(...params: any): void;
    /**
     * Dump
     */
    static dump(...params: any): void;
    /**
     * Sleep amount of milliseconds
     */
    static sleep(milliseconds: number): Promise<void>;
    /**
     * Path to the project with ending slash
     * @return e.g. /tmp/myproject/
     */
    static projectPath(): string;
    /**
     * Path to the storage with ending slash
     * @return e.g. /tmp/myproject/storage/
     */
    static storagePath(): string;
    /**
     * Pluck fields from object or from array of objects
     * @return object or array with needed fields
     *
     * @example
     * Helper.pluckMany([{name: 'alex', age: 10}, {name: 'sharon', age: 11}], ['age']) -> [{age: 10}, {age: 11}]
     *
     * @example
     * Helper.pluckMany({name: 'igor', age: 33, birthday: 'foobar'}, ['age', 'birthday']) -> {age: 33, birthday: 'foobar'}
     */
    static pluckMany(collection: unknown, fields: string[]): unknown;
    /**
     * Start profiling
     * Creates a time measurement label
     */
    static timeMeasurementLabel: number;
    static startProfiling(): void;
    /**
     * Stop profiling
     * Displays past time after last startProfiling method call
     */
    static stopProfiling(): void;
    /**
     * Paginate any array with data
     * @return part of array on specific page and size
     */
    static paginateArray(data: any[], page: number, pageSize: number): any[];
    /**
     * Assemble pagination
     * @return pagination object
     */
    static assemblePagination(data: any[], page: number, pageSize: number): {
        page: number;
        pageSize: number;
        totalPages: number;
        totalElements: number;
    };
}