Regen docs (#373)

diff --git a/docs/dyn/appengine_v1beta4.apps.modules.versions.instances.html b/docs/dyn/appengine_v1beta4.apps.modules.versions.instances.html
index 43ad34a..58e36e9 100644
--- a/docs/dyn/appengine_v1beta4.apps.modules.versions.instances.html
+++ b/docs/dyn/appengine_v1beta4.apps.modules.versions.instances.html
@@ -85,7 +85,7 @@
 <p class="firstline">Gets instance information.</p>
 <p class="toc_element">
   <code><a href="#list">list(appsId, modulesId, versionsId, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
-<p class="firstline">Lists the instances of a version.</p>
+<p class="firstline">Lists the instances of a version.Tip: To aggregate details about instances over time, see the Stackdriver Monitoring API (https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).</p>
 <p class="toc_element">
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
@@ -203,7 +203,7 @@
 
 <div class="method">
     <code class="details" id="list">list(appsId, modulesId, versionsId, pageSize=None, pageToken=None, x__xgafv=None)</code>
-  <pre>Lists the instances of a version.
+  <pre>Lists the instances of a version.Tip: To aggregate details about instances over time, see the Stackdriver Monitoring API (https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list).
 
 Args:
   appsId: string, Part of `name`. Name of the resource requested. Example: apps/myapp/modules/default/versions/v1. (required)