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import java.util.Set;
interface Ancestor {}
interface Subject extends Ancestor {}
class Descendant implements Subject {}
class Type {
private Set myField;
public void meth() {
Set<Ancestor> ancestors = null;
myField = ancestors;
Set<? extends Ancestor> ancestorExtends = null;
myField = ancestorExtends;
Set<? super Ancestor> ancestorSupers = null;
myField = ancestorSupers;
Set<Subject> subjects = null;
myField = subjects;
Set<? extends Subject> subjectExtends = null;
myField = subjectExtends;
Set<? super Subject> subjectSupers = null;
myField = subjectSupers;
Set<Descendant> descendants = null;
myField = descendants;
Set<? extends Descendant> descendantExtends = null;
myField = descendantExtends;
Set<? super Descendant> descendantSupers = null;
myField = descendantSupers;
Set set = null;
myField = set;
}
}
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