export function shallowClone<T>(obj: T): T {
	if (!obj) {
		return obj;
	}
	if (Array.isArray(obj)) {
		return obj.slice() as T;
	}
	if (typeof obj === 'object') {
		return Object.assign({}, obj);
	}
	// skip Map, Set, WeakMap, WeakSet, Date, RegExp, etc.
	return obj;
}