Add raw_api.update_file_retention

Author: ppolewicz

b2sdk/raw_api.py

@@ -284,6 +284,18 @@ def update_bucket(
     ):
         pass
 
+    @abstractmethod
+    def update_file_retention(
+        self,
+        api_url,
+        account_auth_token,
+        file_id,
+        file_name,
+        file_retention: FileRetentionSetting,
+        bypass_governance: bool = False,
+    ):
+        pass
+
     @abstractmethod
     def upload_file(
         self,
@@ -698,6 +710,27 @@ def update_bucket(
             **kwargs
         )
 
+    def update_file_retention(
+        self,
+        api_url,
+        account_auth_token,
+        file_id,
+        file_name,
+        file_retention,
+        bypass_governance=False
+    ):
+        kwargs = {}
+        kwargs['fileRetention'] = file_retention.serialize_to_json_for_request()
+        return self._post_json(
+            api_url,
+            'b2_update_file_retention',
+            account_auth_token,
+            fileId=file_id,
+            fileName=file_name,
+            bypassGovernance=bypass_governance,
+            **kwargs
+        )
+
     def unprintable_to_hex(self, string):
         """
         Replace unprintable chars in string with a hex representation.