in packages/ide-toolbox/src/util/classNames.ts [1:5]
export function classNames(...classNames: (string | undefined | null)[]) {
const splittedClassNamesWithoutNullable = classNames.flatMap(className => className ? className.split(' ') : []);
const uniqClassNames = [...new Set(splittedClassNamesWithoutNullable)];
return uniqClassNames.join(' ');
};