move _get_version

certbot-postfix/certbot_postfix/installer.py

@@ -146,6 +146,19 @@ class Installer(plugins_common.Plugin):
         # - Built-in support for TLS management and DANE added, see:
         #   http://www.postfix.org/postfix-tls.1.html
 
+    def _get_version(self):
+        """Return the mail version of Postfix.
+
+        Version is returned as a tuple. (e.g. '2.11.3' is (2, 11, 3))
+
+        :returns: version
+        :rtype: tuple
+
+        :raises .PluginError: Unable to find Postfix version.
+
+        """
+        mail_version = self.get_config_var("mail_version", default=True)
+        return tuple(int(i) for i in mail_version.split('.'))
 
     def find_postfix_cf(self):
         "Search far and wide for the correct postfix configuration file"
@@ -242,20 +255,6 @@ class Installer(plugins_common.Plugin):
     # https://github.com/letsencrypt/letsencrypt/blob/master/letsencrypt/plugins/common.py#L35
 
 
-    def _get_version(self):
-        """Return the mail version of Postfix.
-
-        Version is returned as a tuple. (e.g. '2.11.3' is (2, 11, 3))
-
-        :returns: version
-        :rtype: tuple
-
-        :raises .PluginError: Unable to find Postfix version.
-
-        """
-        mail_version = self.get_config_var("mail_version", default=True)
-        return tuple(int(i) for i in mail_version.split('.'))
-
     def more_info(self):
         """Human-readable string to help the user.
         Should describe the steps taken and any relevant info to help the user