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diff --git a/src/mailman/interfaces/templates.py b/src/mailman/interfaces/templates.py
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+# Copyright (C) 2012 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Template downloader with cache."""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'ITemplateLoader',
+    ]
+
+
+from zope.interface import Interface
+
+
+
+class ITemplateLoader(Interface):
+    """The template downloader utility."""
+
+    def get(uri):
+        """Download the named URI, and return the response and content.
+
+        This API uses `urllib2`_ so consult its documentation for details.
+
+        .. _`urllib2`: http://docs.python.org/library/urllib2.html
+
+        :param uri: The URI of the resource.  These may be any URI supported
+            by `urllib2` and also `mailman:` URIs for internal resources.
+        :type uri: string
+        :return: An open file object as defined by urllib2.
+        """