Initial work is done

node_modules/ts-mixer/dist/esm/mixin-tracking.d.ts

@@ -0,0 +1,4 @@
+import { Class } from './types';
+export declare const getMixinsForClass: (clazz: Class) => Function[] | undefined;
+export declare const registerMixins: (mixedClass: any, constituents: Function[]) => Map<any, Function[]>;
+export declare const hasMixin: <M>(instance: any, mixin: abstract new (...args: any[]) => M) => instance is M;