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import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.dataflow.qual.Pure;
class Other {
public static final class StaticIterator<T> implements Iterator<T> {
Enumeration<T> e;
public StaticIterator(Enumeration<T> e) {
this.e = e;
}
public boolean hasNext() {
return e.hasMoreElements();
}
public T next() {
return e.nextElement();
}
public void remove() {
throw new UnsupportedOperationException();
}
}
public final class FinalIterator<T> implements Iterator<T> {
Enumeration<T> e;
public FinalIterator(Enumeration<T> e) {
this.e = e;
}
public boolean hasNext() {
return e.hasMoreElements();
}
public T next() {
return e.nextElement();
}
public void remove() {
throw new UnsupportedOperationException();
}
}
}
class Entry<K, V> implements Map.Entry<K, V> {
public V setValue(V newValue) {
throw new RuntimeException();
}
@SuppressWarnings("purity") // new and throw are not allowed, ignore
@Pure
public K getKey() {
throw new RuntimeException();
}
@SuppressWarnings("purity") // new and throw are not allowed, ignore
@Pure
public V getValue() {
throw new RuntimeException();
}
}
interface Function<F, T extends @Nullable Object> {
T apply(@Nullable F from);
@Pure
boolean equals(@Nullable Object obj);
}
enum IdentityFunction implements Function<Object, @Nullable Object> {
INSTANCE;
public @Nullable Object apply(@Nullable Object o) {
return o;
}
}
abstract class FilteredCollection<E> implements Collection<E> {
public boolean addAll(Collection<? extends E> collection) {
for (E element : collection) {}
return true;
}
}
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