Draft: Resolve "provide locking functionality in crud"

Closes #27

src/tgclients/crud.py

@@ -87,6 +87,38 @@ class TextgridCRUD:
         response.encoding = RESPONSE_ENCODING
         return response
 
+    def lock_resource(self, sid: str, textgrid_uri: str):
+        """Lock a Textgrid Resource.
+
+        Args:
+            sid (str): Session ID
+            textgrid_uri (str): Textgrid URI
+
+        Returns:
+            Response: HTTP response from service
+        """
+        params = {'sessionId': sid}
+        response = requests.get(
+            self._url + '/' + textgrid_uri + '/lock', params=params)
+        response.encoding = RESPONSE_ENCODING
+        return response
+
+    def unlock_resource(self, sid: str, textgrid_uri: str):
+        """Unlock a Textgrid Resource.
+
+        Args:
+            sid (str): Session ID
+            textgrid_uri (str): Textgrid URI
+
+        Returns:
+            Response: HTTP response from service
+        """
+        params = {'sessionId': sid}
+        response = requests.get(
+            self._url + '/' + textgrid_uri + '/unlock', params=params)
+        response.encoding = RESPONSE_ENCODING
+        return response
+
     @staticmethod
     def _prepare_multipart(data, metadata):
         """Create a streaming multipart object.