title: Simple solution for instance-level Typescript decorators?
body: <p>Using the experimental decorators for Typescript, is there a simple way of adding properties to an instance of a class? I'd like to use them similar to how mixins are applied to es5-based React components.</p>
  
  <p>I'm finding decorators can add properties to the class itself but they don't get applied to individual instances created with the new operator. </p>