This package exports the form classes from @angular/forms, and EventEmitter from @angular/core.
The code is copied from commit 2b590316be110d3aa3122924c24e47fd77d5475e.
Why? Because those classes are very useful for handling forms in react. Why??? Because React is Reactive, and so is Reactive Forms. And also because it was increasing my bundle size by nearly a megabyte.