Tests for declaration mappings dumping from compiler

compiler/testData/codegen/dumpDeclarations/interfaces.kt

@@ -0,0 +1,32 @@
+public interface PublicInterface {
+
+    companion object {}
+
+    public object ObjPublic
+    private object ObjPrivate
+
+    public class NestedPublic
+    private  class NestedPrivate
+}
+
+internal interface InternalInterface {
+    companion object {}
+}
+
+internal interface InternalInterfacePrivateCompanion {
+    private companion object {}
+}
+
+private interface PrivateInterface {
+    companion object {}
+
+    public object ObjPublic
+    private object ObjPrivate
+
+    public class NestedPublic
+    private class NestedPrivate
+}
+
+private interface PrivateInterfacePrivateCompanion {
+    private companion object
+}