polymorphic.js

// the way it was:

MyApp.Record = SC.Record.extend({
  //..
});

MyApp.Record.isPolymorhic = YES;



// versus what it could be:

MyApp.Record = SC.Record.extend({

  // SC.Record has some magic sauce to take this out
  // and apply it to itself, rather than its .prototype
  isPolymorphic: YES

});