chore: regens API reference docs (#889)

diff --git a/docs/dyn/containeranalysis_v1alpha1.projects.operations.html b/docs/dyn/containeranalysis_v1alpha1.projects.operations.html
index e4cec93..900e808 100644
--- a/docs/dyn/containeranalysis_v1alpha1.projects.operations.html
+++ b/docs/dyn/containeranalysis_v1alpha1.projects.operations.html
@@ -75,19 +75,19 @@
 <h1><a href="containeranalysis_v1alpha1.html">Container Analysis API</a> . <a href="containeranalysis_v1alpha1.projects.html">projects</a> . <a href="containeranalysis_v1alpha1.projects.operations.html">operations</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(parent, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(parent, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a new `Operation`.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#patch">patch(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Updates an existing operation returns an error if operation</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(parent, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(parent, body=None, x__xgafv=None)</code>
   <pre>Creates a new `Operation`.
 
 Args:
   parent: string, The project Id that this operation should be created under. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request for creating an operation
@@ -191,7 +191,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(name, body, x__xgafv=None)</code>
+    <code class="details" id="patch">patch(name, body=None, x__xgafv=None)</code>
   <pre>Updates an existing operation returns an error if operation
  does not exist. The only valid operations are to update mark the done bit
 change the result.
@@ -199,7 +199,7 @@
 Args:
   name: string, The name of the Operation.
 Should be of the form "projects/{provider_id}/operations/{operation_id}". (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # Request for updating an existing operation