The Observer is from the package "androidx.lifecyc...

# announcements

[Alexey Subbota]

The Observer is from the package "androidx.lifecycle" and looks like this
public interface Observer<T> {
void onChanged(T t);
}
Why the Observer compiles but Sample does not compile?
Error is 'Interface Sample does not have constructors'

Sample___Observer_-_what_is_the_difference_.js