export declare class StringUtils {
    static charAt(value: string, position?: number): string;
    static slugify(value: string, separator: string): string;
    static toCamelCase(value: string): string;
    static toLowerCase(value: string): string;
    static toPascalCase(value: string): string;
    static toSentenceCase(value: string): string;
    static toTitleCase(value: string, separator: string, exclusions?: string[]): string;
    static toUpperCase(value: string): string;
}