This only shows up in the language service. Calls to symbols
that are not resolve resulted in null instead of being resolved
causing the language service to see exceptions when the null
was not expected such as in the animations array.
Fixes#15969
Allows to inherit ctor args, lifecycle hooks and statics from a class
in another compilation unit.
Will error if trying to inherit from a class in another compilation unit
that has an `@Component` / `@Directive` / `@Pipe` / `@NgModule`.
`ngc` would look for flat module resources relative to the flat module index.
`ngc` now looks for flat module resources relative to the `.d.ts` file that declarates
the component.
Fixes#15221
PR Close#15367
