Add more relay-lock-related code

Author: bouwew

plugwise_usb/nodes/node.py

@@ -301,6 +301,14 @@ def relay_config(self) -> RelayConfig:
             )
         raise NotImplementedError()
 
+    @property
+    @raise_not_loaded
+    def relay_lock(self) -> bool:
+        """Relay value."""
+        if NodeFeature.RELAY_LOCK not in self._features:
+            raise FeatureError(f"Relay lock is not supported for node {self.mac}")
+        raise NotImplementedError()
+
     @property
     @raise_not_loaded
     def switch(self) -> bool:
@@ -766,7 +774,16 @@ async def set_relay(self, state: bool) -> bool:
         """Change the state of the relay."""
         if NodeFeature.RELAY not in self._features:
             raise FeatureError(
-                f"Changing state of relay is not supported for node {self.mac}"
+                f"Changing relay-lock is not supported for node {self.mac}"
+            )
+        raise NotImplementedError()
+
+    @raise_not_loaded
+    async def set_relay_lock(self, state: bool) -> bool:
+        """Change lock of the relay."""
+        if NodeFeature.RELAY_LOCK not in self._features:
+            raise FeatureError(
+                f"Changing relay-lock is not supported for node {self.mac}"
             )
         raise NotImplementedError()