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public class DelegateGenerics<T> { @lombok.experimental.Delegate I1<T> target; } interface I1<T> extends I2<T, Integer, String> { } interface I2<A, T, I> extends I3<Integer, I, A> { } interface I3<T, I, A> { public T t(T t); public I i(I a); public A a(A a); }