Tests for showing synthetic methods in file structure view

idea/testData/structureView/fileStructure/InheritedSAMConversion.Data.java

@@ -0,0 +1,9 @@
+public class TestSAM {
+    public interface SamClass {
+        void foo();
+    }
+
+    void foo(SamClass samClass) {
+
+    }
+}