message: Gallery: ts fixes
diff: -import { ObjectClassNames } from '../types/props';
  +export interface ObjectClassNames {
  + [index: string]: boolean;
  +}
  -type ClassName = number | string | ObjectClassNames | false | null | undefined;
  +export type ClassName = number | string | ObjectClassNames | false | null | undefined;
  export default function classNames(...classnames: ClassName[]) {
  let result: string[] = [];
  