1 files changed, 8 insertions, 0 deletions

diff --git a/src/mailman/interfaces/user.py b/src/mailman/interfaces/user.py
index f1932fd7f..bdeccce3f 100644
--- a/src/mailman/interfaces/user.py
+++ b/src/mailman/interfaces/user.py
@@ -109,3 +109,11 @@ class IUser(Interface):
 
     preferences = Attribute(
         """This user's preferences.""")
+
+    def absorb(user):
+        """Merge this user's attributes and memberships, and then delete it.
+
+        In case of conflict, the current user's properties are preserved.
+        If an IAddress is given, the merge will be performed on the addresses'
+        linked user.
+        """