export declare class Case {
    static camel(str: string): string;
    static capital(str: string): string;
    static constant: (str: string) => string;
    static dot(str: string): string;
    static no: (str: string) => string;
    static pascal(str: string): string;
    static path: (str: string) => string;
    static sentence: (str: string) => string;
    static snake: (str: string) => string;
    static train(str: string): string;
    static kebab(str: string): string;
    static sponge(str: string): string;
    static swap(str: string): string;
    static title(str: string): string;
    static upper(str: string): string;
    static localeUpper(str: string, locale: string): string;
    static lower(str: string): string;
    static localeLower(str: string, locale: string): string;
    static lowerFirst(str: string): string;
    static upperFirst(str: string): string;
    static isUpper(str: string): boolean;
    static isLower(str: string): boolean;
}