feat: baseClass

packages/core/index.js

@@ -18,6 +18,7 @@ export {
   mergeDiffPrimitive,
 } from './merge-diff';
 export {
+  baseClass,
   map as mapObject,
 } from './object';
 export {PropertyMixin as Property} from './property';

packages/core/object.js

@@ -1,3 +1,5 @@
+export const baseClass = class {};
+
 export function map(O, fn) {
   const keys = Object.keys(O);
   const result = {};