/**
 * Converts a string to Title Case.
 *
 * @example
 * toTitleCase("Hello World") // "Hello World"
 * toTitleCase("kebab-case-string") // "Kebab Case String"
 * toTitleCase("") // ""
 *
 * @param str The string to convert to Title Case.
 * @returns The Title Case version of the input string.
 */
export declare function toTitleCase(str: string): string;