Type hints for bindings

libs/lib/xaal/lib/bindings.py

@@ -74,13 +74,13 @@ class URL:
     def __str__(self):
         return str(self.__url)
 
-    def __repr__(self):  # pragma: no cover
+    def __repr__(self) -> str:  # pragma: no cover
         return f"URL('{self.__url}')"
 
-    def set(self, value):
+    def set(self, value: str):
         self.__url = value
 
-    def get(self):
+    def get(self) -> str:
         return self.__url
 
     @property