diff --git a/package.json b/package.json
index b1e8184..f3864e8 100644
--- a/package.json
+++ b/package.json
@@ -11,9 +11,9 @@
   },
   "license": "MIT",
   "dependencies": {
-    "@abaplint/cli": "^2.113.136",
-    "@abaplint/runtime": "^2.10.61",
-    "@abaplint/database-sqlite": "^2.10.24",
-    "@abaplint/transpiler-cli": "^2.10.61"
+    "@abaplint/cli": "^2.113.151",
+    "@abaplint/runtime": "^2.11.2",
+    "@abaplint/database-sqlite": "^2.11.0",
+    "@abaplint/transpiler-cli": "^2.11.2"
   }
 }
diff --git a/src/cl_gui_alv_grid.clas.abap b/src/cl_gui_alv_grid.clas.abap
index b26c6ee..0cb3b6f 100644
--- a/src/cl_gui_alv_grid.clas.abap
+++ b/src/cl_gui_alv_grid.clas.abap
@@ -6,8 +6,6 @@ CLASS cl_gui_alv_grid DEFINITION PUBLIC INHERITING FROM cl_gui_control.
         i_parent      TYPE REF TO cl_gui_container
         i_appl_events TYPE char1 DEFAULT space.
 
-    METHODS free.
-
     METHODS set_frontend_layout
       IMPORTING
         is_layout TYPE any.
@@ -238,10 +236,6 @@ CLASS cl_gui_alv_grid IMPLEMENTATION.
     ASSERT 1 = 'todo'.
   ENDMETHOD.
 
-  METHOD free.
-    ASSERT 1 = 'todo'.
-  ENDMETHOD.
-
   METHOD refresh_table_display.
     ASSERT 1 = 'todo'.
   ENDMETHOD.
diff --git a/src/cl_gui_control.clas.abap b/src/cl_gui_control.clas.abap
index 8a07bcc..29a882a 100644
--- a/src/cl_gui_control.clas.abap
+++ b/src/cl_gui_control.clas.abap
@@ -15,9 +15,22 @@ CLASS cl_gui_control DEFINITION PUBLIC.
       IMPORTING
         visible TYPE c.
 
+    METHODS set_registered_events
+      IMPORTING
+        events TYPE any.
+
+    METHODS free.
+
 ENDCLASS.
 
 CLASS cl_gui_control IMPLEMENTATION.
+  METHOD free.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+  METHOD set_registered_events.
+    RETURN. " todo, implement method
+  ENDMETHOD.
 
   METHOD set_visible.
     RETURN. " todo, implement method
diff --git a/src/cl_gui_html_viewer.clas.abap b/src/cl_gui_html_viewer.clas.abap
new file mode 100644
index 0000000..31dda3d
--- /dev/null
+++ b/src/cl_gui_html_viewer.clas.abap
@@ -0,0 +1,65 @@
+CLASS cl_gui_html_viewer DEFINITION PUBLIC INHERITING FROM cl_gui_control.
+  PUBLIC SECTION.
+    EVENTS sapevent
+      EXPORTING
+        VALUE(action) TYPE c OPTIONAL
+        VALUE(frame) TYPE c OPTIONAL
+        VALUE(getdata) TYPE c OPTIONAL
+        VALUE(postdata) TYPE any OPTIONAL
+        VALUE(query_table) TYPE any OPTIONAL.
+
+    METHODS constructor
+      IMPORTING
+        parent               TYPE REF TO cl_gui_container
+        query_table_disabled TYPE c OPTIONAL.
+
+    METHODS go_back.
+
+    METHODS close_document.
+
+    METHODS get_current_url
+      EXPORTING
+        url TYPE c.
+
+    METHODS load_data
+      IMPORTING
+        url          TYPE c OPTIONAL
+        type         TYPE c DEFAULT 'text'
+        subtype      TYPE c DEFAULT 'html'
+        size         TYPE i DEFAULT 0
+      EXPORTING
+        assigned_url TYPE c
+      CHANGING
+        data_table   TYPE STANDARD TABLE.
+
+    METHODS show_url
+      IMPORTING
+        url TYPE c.
+ENDCLASS.
+
+CLASS cl_gui_html_viewer IMPLEMENTATION.
+  METHOD show_url.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+  METHOD load_data.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+  METHOD get_current_url.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+  METHOD close_document.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+  METHOD go_back.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+  METHOD constructor.
+    RETURN. " todo, implement method
+  ENDMETHOD.
+
+ENDCLASS.
\ No newline at end of file
diff --git a/src/cl_gui_picture.clas.abap b/src/cl_gui_picture.clas.abap
index 67c52c7..2d67340 100644
--- a/src/cl_gui_picture.clas.abap
+++ b/src/cl_gui_picture.clas.abap
@@ -8,8 +8,6 @@ CLASS cl_gui_picture DEFINITION INHERITING FROM cl_gui_control PUBLIC.
 
     METHODS clear_picture.
 
-    METHODS free.
-
     METHODS set_display_mode
       IMPORTING
         display_mode TYPE i.
@@ -35,10 +33,6 @@ CLASS cl_gui_picture IMPLEMENTATION.
     RETURN. " todo, implement method
   ENDMETHOD.
 
-  METHOD free.
-    RETURN. " todo, implement method
-  ENDMETHOD.
-
   METHOD clear_picture.
     RETURN. " todo, implement method
   ENDMETHOD.