1 files changed, 10 insertions, 0 deletions

diff --git a/Mailman/interfaces/chain.py b/Mailman/interfaces/chain.py
index 8c0837820..eca663b30 100644
--- a/Mailman/interfaces/chain.py
+++ b/Mailman/interfaces/chain.py
@@ -69,6 +69,16 @@ class IChain(Interface):
         :return: an IChainLink.
         """
 
+    def get_rule(name):
+        """Lookup and return the named rule.
+
+        :param name: The name of the rule to return.  This may be a globally
+            registered rule name, in which case it must be unique, or it may
+            be a rule defined locally to the chain.
+        :return: The named `IRule`.
+        :raises: KeyError if the named rule cannot be found.
+        """
+
 
 
 class IMutableChain(IChain):