diff --git a/Klassen.py b/Klassen.py
index 1da7037..af59a1d 100644
--- a/Klassen.py
+++ b/Klassen.py
@@ -62,5 +62,8 @@ class Formel:
     def solve(self, ges):
         pass
 
+    def _solve_to_i(self):
+        pass
+