Core SDK Interoperability

[matthias-springer]

Generated interfaces of (abstract) SDK classes should be implemented by the following Java interfaces.

List_interface<T> extends java.util.List<T>
Map__interface<K, V> extends java.util.Map<K, V>
Iterable_interface<T> extends java.lang.Iterable<T>
Iterator_interface<T> extends java.lang.Iterator<T>
Comparable_interface<T> extends java.lang.Comparable<T>

(There might be more SDK classes, but these are the most important ones IMO.)

This means that additional methods must be inserted as soon as a class implements one of these Dart classes.