Update docs for 1.4.2 release
diff --git a/docs/dyn/content_v2.datafeeds.html b/docs/dyn/content_v2.datafeeds.html
index cb8fefe..fe08037 100644
--- a/docs/dyn/content_v2.datafeeds.html
+++ b/docs/dyn/content_v2.datafeeds.html
@@ -75,16 +75,16 @@
 <h1><a href="content_v2.html">Content API for Shopping</a> . <a href="content_v2.datafeeds.html">datafeeds</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#custombatch">custombatch(body)</a></code></p>
+  <code><a href="#custombatch">custombatch(body, dryRun=None)</a></code></p>
 <p class="firstline">A description of how to use this function</p>
 <p class="toc_element">
-  <code><a href="#delete">delete(merchantId, datafeedId)</a></code></p>
+  <code><a href="#delete">delete(merchantId, datafeedId, dryRun=None)</a></code></p>
 <p class="firstline">Deletes a datafeed from your Merchant Center account.</p>
 <p class="toc_element">
   <code><a href="#get">get(merchantId, datafeedId)</a></code></p>
 <p class="firstline">Retrieves a datafeed from your Merchant Center account.</p>
 <p class="toc_element">
-  <code><a href="#insert">insert(merchantId, body)</a></code></p>
+  <code><a href="#insert">insert(merchantId, body, dryRun=None)</a></code></p>
 <p class="firstline">Registers a datafeed with your Merchant Center account.</p>
 <p class="toc_element">
   <code><a href="#list">list(merchantId, pageToken=None, maxResults=None)</a></code></p>
@@ -93,14 +93,14 @@
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(merchantId, datafeedId, body)</a></code></p>
+  <code><a href="#patch">patch(merchantId, datafeedId, body, dryRun=None)</a></code></p>
 <p class="firstline">Updates a datafeed of your Merchant Center account. This method supports patch semantics.</p>
 <p class="toc_element">
-  <code><a href="#update">update(merchantId, datafeedId, body)</a></code></p>
+  <code><a href="#update">update(merchantId, datafeedId, body, dryRun=None)</a></code></p>
 <p class="firstline">Updates a datafeed of your Merchant Center account.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="custombatch">custombatch(body)</code>
+    <code class="details" id="custombatch">custombatch(body, dryRun=None)</code>
   <pre>A description of how to use this function
 
 Args:
@@ -131,7 +131,7 @@
               "password": "A String", # An optional password for fetch_url.
               "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
             },
-            "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+            "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
             "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
             "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
               "A String",
@@ -145,6 +145,7 @@
     ],
   }
 
+  dryRun: boolean, Flag to run the request in dry-run mode.
 
 Returns:
   An object of the form:
@@ -184,7 +185,7 @@
               "password": "A String", # An optional password for fetch_url.
               "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
             },
-            "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+            "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
             "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
             "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
               "A String",
@@ -198,12 +199,13 @@
 </div>
 
 <div class="method">
-    <code class="details" id="delete">delete(merchantId, datafeedId)</code>
+    <code class="details" id="delete">delete(merchantId, datafeedId, dryRun=None)</code>
   <pre>Deletes a datafeed from your Merchant Center account.
 
 Args:
   merchantId: string, A parameter (required)
   datafeedId: string, A parameter (required)
+  dryRun: boolean, Flag to run the request in dry-run mode.
 </pre>
 </div>
 
@@ -237,7 +239,7 @@
         "password": "A String", # An optional password for fetch_url.
         "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
       },
-      "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+      "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
       "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
       "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
         "A String",
@@ -248,7 +250,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="insert">insert(merchantId, body)</code>
+    <code class="details" id="insert">insert(merchantId, body, dryRun=None)</code>
   <pre>Registers a datafeed with your Merchant Center account.
 
 Args:
@@ -275,7 +277,7 @@
       "password": "A String", # An optional password for fetch_url.
       "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
     },
-    "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+    "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
     "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
     "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
       "A String",
@@ -284,6 +286,7 @@
     "attributeLanguage": "A String", # The two-letter ISO 639-1 language in which the attributes are defined in the data feed.
   }
 
+  dryRun: boolean, Flag to run the request in dry-run mode.
 
 Returns:
   An object of the form:
@@ -307,7 +310,7 @@
         "password": "A String", # An optional password for fetch_url.
         "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
       },
-      "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+      "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
       "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
       "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
         "A String",
@@ -352,7 +355,7 @@
             "password": "A String", # An optional password for fetch_url.
             "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
           },
-          "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+          "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
           "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
           "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
             "A String",
@@ -379,7 +382,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(merchantId, datafeedId, body)</code>
+    <code class="details" id="patch">patch(merchantId, datafeedId, body, dryRun=None)</code>
   <pre>Updates a datafeed of your Merchant Center account. This method supports patch semantics.
 
 Args:
@@ -407,7 +410,7 @@
       "password": "A String", # An optional password for fetch_url.
       "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
     },
-    "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+    "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
     "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
     "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
       "A String",
@@ -416,6 +419,7 @@
     "attributeLanguage": "A String", # The two-letter ISO 639-1 language in which the attributes are defined in the data feed.
   }
 
+  dryRun: boolean, Flag to run the request in dry-run mode.
 
 Returns:
   An object of the form:
@@ -439,7 +443,7 @@
         "password": "A String", # An optional password for fetch_url.
         "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
       },
-      "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+      "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
       "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
       "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
         "A String",
@@ -450,7 +454,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(merchantId, datafeedId, body)</code>
+    <code class="details" id="update">update(merchantId, datafeedId, body, dryRun=None)</code>
   <pre>Updates a datafeed of your Merchant Center account.
 
 Args:
@@ -478,7 +482,7 @@
       "password": "A String", # An optional password for fetch_url.
       "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
     },
-    "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+    "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
     "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
     "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
       "A String",
@@ -487,6 +491,7 @@
     "attributeLanguage": "A String", # The two-letter ISO 639-1 language in which the attributes are defined in the data feed.
   }
 
+  dryRun: boolean, Flag to run the request in dry-run mode.
 
 Returns:
   An object of the form:
@@ -510,7 +515,7 @@
         "password": "A String", # An optional password for fetch_url.
         "dayOfMonth": 42, # The day of the month the feed file should be fetched (1-31).
       },
-      "targetCountry": "A String", # The two-letter ISO 3166 country where the items in the feed will be included in the search index.
+      "targetCountry": "A String", # The country where the items in the feed will be included in the search index, represented as a CLDR territory code.
       "fileName": "A String", # The filename of the feed. All feeds must have a unique file name.
       "intendedDestinations": [ # The list of intended destinations (corresponds to checked check boxes in Merchant Center).
         "A String",