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class Test {
static class TKey<T> {}
public interface Getter {
<T> T getValue(TKey<T> key);
}
public static <TK extends TKey<?>> TK getAKey(TK tKeySuffix) {
return tKeySuffix;
}
static final TKey<Double> KEY_D = new TKey<>();
public static void f(Getter getter) {
double d1 = getter.getValue(KEY_D);
double d2 = getter.getValue(getAKey(KEY_D));
TKey<Double> aKey = getAKey(KEY_D);
double d3 = getter.getValue(aKey);
}
}
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