diff --git a/package.json b/package.json
index e83c33d2..4ed91fac 100644
--- a/package.json
+++ b/package.json
@@ -13,10 +13,10 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@abaplint/cli": "^2.113.9",
-    "@abaplint/database-sqlite": "^2.8.25",
-    "@abaplint/runtime": "^2.10.19",
-    "@abaplint/transpiler-cli": "^2.10.19",
+    "@abaplint/cli": "^2.113.17",
+    "@abaplint/database-sqlite": "^2.10.20",
+    "@abaplint/runtime": "^2.10.20",
+    "@abaplint/transpiler-cli": "^2.10.20",
     "0x": "^5.7.0"
   }
 }
diff --git a/src/cl_demo_output.clas.abap b/src/demo/cl_demo_output.clas.abap
similarity index 52%
rename from src/cl_demo_output.clas.abap
rename to src/demo/cl_demo_output.clas.abap
index 5190b61c..5d8ab0a4 100644
--- a/src/cl_demo_output.clas.abap
+++ b/src/demo/cl_demo_output.clas.abap
@@ -1,5 +1,7 @@
 CLASS cl_demo_output DEFINITION PUBLIC.
   PUBLIC SECTION.
+    INTERFACES if_demo_output.
+
     CLASS-METHODS write
       IMPORTING
         data TYPE any
@@ -7,10 +9,14 @@ CLASS cl_demo_output DEFINITION PUBLIC.
 
     CLASS-METHODS clear.
 
+    CLASS-METHODS new
+      RETURNING
+        VALUE(output) TYPE REF TO if_demo_output.
+
     CLASS-METHODS display
       IMPORTING
-      data TYPE any OPTIONAL
-      name TYPE string OPTIONAL PREFERRED PARAMETER data.
+        data TYPE any OPTIONAL
+        name TYPE string OPTIONAL PREFERRED PARAMETER data.
 ENDCLASS.
 
 CLASS cl_demo_output IMPLEMENTATION.
@@ -18,6 +24,14 @@ CLASS cl_demo_output IMPLEMENTATION.
     ASSERT 1 = 'not supported'.
   ENDMETHOD.
 
+  METHOD if_demo_output~write.
+    ASSERT 1 = 'not supported'.
+  ENDMETHOD.
+
+  METHOD new.
+    ASSERT 1 = 'not supported'.
+  ENDMETHOD.
+
   METHOD clear.
     ASSERT 1 = 'not supported'.
   ENDMETHOD.
@@ -25,4 +39,8 @@ CLASS cl_demo_output IMPLEMENTATION.
   METHOD display.
     ASSERT 1 = 'not supported'.
   ENDMETHOD.
+
+  METHOD if_demo_output~display.
+    ASSERT 1 = 'not supported'.
+  ENDMETHOD.
 ENDCLASS.
\ No newline at end of file
diff --git a/src/demo/if_demo_output.intf.abap b/src/demo/if_demo_output.intf.abap
new file mode 100644
index 00000000..019170ff
--- /dev/null
+++ b/src/demo/if_demo_output.intf.abap
@@ -0,0 +1,9 @@
+INTERFACE if_demo_output PUBLIC.
+
+  METHODS write
+    IMPORTING
+      data TYPE any.
+
+  METHODS display.
+
+ENDINTERFACE.
\ No newline at end of file