/**
 * Custom camelCase function that preserves emoji strings
 */
export declare function customCamelCase(input: string): string;
/**
 * Converts object keys from snake_case to camelCase recursively
 */
export declare function camelCaseKeys<T>(obj: T): T;
/**
 * Converts object keys from camelCase to snake_case recursively
 */
export declare function snakeCaseKeys<T>(obj: T): T;