Mailtrap backend: add set_tags

Author: cahna

anymail/backends/mailtrap.py

@@ -1,13 +1,12 @@
 import sys
-import warnings
 from urllib.parse import quote
 
 if sys.version_info < (3, 11):
     from typing_extensions import Any, Dict, List, Literal, NotRequired, TypedDict
 else:
     from typing import Any, Dict, List, Literal, NotRequired, TypedDict
 
-from ..exceptions import AnymailRequestsAPIError, AnymailWarning
+from ..exceptions import AnymailRequestsAPIError
 from ..message import AnymailMessage, AnymailRecipientStatus
 from ..utils import Attachment, EmailAddress, get_anymail_setting, update_deep
 from .base_requests import AnymailRequestsBackend, RequestsPayload
@@ -139,6 +138,12 @@ def add_attachment(self, attachment: Attachment):
             att["content_id"] = attachment.cid
         self.data.setdefault("attachments", []).append(att)
 
+    def set_tags(self, tags: List[str]):
+        if len(tags) > 1:
+            self.unsupported_feature("multiple tags")
+        if len(tags) > 0:
+            self.data["category"] = tags[0]
+
     def set_metadata(self, metadata):
         self.data.setdefault("custom_variables", {}).update(
             {str(k): str(v) for k, v in metadata.items()}