diff --git a/src/blenderbim/blenderbim/core/tool.py b/src/blenderbim/blenderbim/core/tool.py
index 3fa9c6808b..9e16e593cd 100644
--- a/src/blenderbim/blenderbim/core/tool.py
+++ b/src/blenderbim/blenderbim/core/tool.py
@@ -421,6 +421,19 @@ class Selector:
     def set_active(cls, obj): pass
 
 
+@interface
+class Sequence:
+    def get_work_plans(cls): pass
+    def load_work_plans(cls): pass
+    def enable_editing_work_plan(cls, work_plan): pass
+    def disable_editing_work_plan(cls): pass
+    def get_current_ifc_work_plan(cls): pass
+    def get_ifc_work_plan_attributes(cls): pass
+    def load_work_plan_attributes(cls): pass
+    def import_attributes(cls): pass
+    def export_attributes(cls): pass
+
+
 @interface
 class Spatial:
     def can_contain(cls, structure_obj, element_obj): pass