diff --git a/interface.go b/interface.go
index 2632267..548d7da 100644
--- a/interface.go
+++ b/interface.go
@@ -94,3 +94,8 @@ type WritableClass interface {
 	Class
 	Writable
 }
+
+type ReadableWritable interface {
+	Readable
+	Writable
+}