unrelated defaults: check if current class contains explicit method (IDEA-164732)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/interfaceMethods/UnrelatedDefaultsWhenOverridingIsPresentExplicitly.java

@@ -0,0 +1,27 @@
+interface A<E> {
+  void foo(E item);
+}
+
+interface B1<E> extends A<E> {
+  @Override
+  default void foo(E item) {}
+}
+
+interface B2<E> extends A<E> {
+  @Override
+  default void foo(E item) {}
+}
+
+interface C1<E> extends B1<E> {}
+
+interface C2<E> extends B2<E> {}
+
+interface Bottom1<E> extends C2<E>, C1<E> {
+  @Override
+  default void foo(E item) {}
+}
+interface Bottom2<E> extends C2<E>, C1<E> {
+  @Override
+  void foo(E item);
+}
+interface <error descr="Bottom3 inherits unrelated defaults for foo(E) from types B2 and B1">Bottom3</error><E> extends C2<E>, C1<E> {}