/**
 * Lowercase first character of the input string
 *
 * @param {string|undefined} [str] input string
 * @returns {string}
 */
export function lowerCaseFirst(str?: string | undefined): string;
/**
 * Converts 'code-mod', 'code_mod' to 'codeMod'
 *
 * @param {string} str
 * @returns {string}
 */
export function snakeToCamelCase(str: string): string;