export declare class CommonService {
    constructor();
    /**
     * Determines if the source string contains any strings found in given substring array.
     * @param source The source string.
     * @param substrings The substring array to check the source against.
     */
    static stringContainsAny(source: string, substrings: Array<string>): boolean;
    /**
     * Determine if the given value is null, empty or undefined.
     * @param value  The value to be inspected.
     */
    static isNullOrEmptyOrUndefined(value: string): boolean;
}