chore: regens API reference docs (#889)

diff --git a/docs/dyn/dataflow_v1b3.projects.html b/docs/dyn/dataflow_v1b3.projects.html
index 3e61c0d..4736e21 100644
--- a/docs/dyn/dataflow_v1b3.projects.html
+++ b/docs/dyn/dataflow_v1b3.projects.html
@@ -98,7 +98,7 @@
   <code><a href="#deleteSnapshots">deleteSnapshots(projectId, location=None, snapshotId=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Deletes a snapshot.</p>
 <p class="toc_element">
-  <code><a href="#workerMessages">workerMessages(projectId, body, x__xgafv=None)</a></code></p>
+  <code><a href="#workerMessages">workerMessages(projectId, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Send a worker_message to the service.</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -122,12 +122,12 @@
 </div>
 
 <div class="method">
-    <code class="details" id="workerMessages">workerMessages(projectId, body, x__xgafv=None)</code>
+    <code class="details" id="workerMessages">workerMessages(projectId, body=None, x__xgafv=None)</code>
   <pre>Send a worker_message to the service.
 
 Args:
   projectId: string, The project to send the WorkerMessages to. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # A request for sending worker messages to the service.
@@ -154,6 +154,19 @@
               "timestamp": "A String", # Timestamp of the measurement.
             },
           ],
+          "containers": { # Per container information.
+              # Key: container name.
+            "a_key": # Object with schema name: ResourceUtilizationReport
+          },
+          "memoryInfo": [ # Memory utilization samples.
+            { # Information about the memory usage of a worker or a container within a
+                # worker.
+              "totalGbMs": "A String", # Total memory (RSS) usage since start up in GB * ms.
+              "currentLimitBytes": "A String", # Instantenous memory limit in bytes.
+              "currentRssBytes": "A String", # Instantenous memory (RSS) size in bytes.
+              "timestamp": "A String", # Timestamp of the measurement.
+            },
+          ],
         },
         "workerMessageCode": { # A message code is used to report status and error messages to the service. # A worker message code.
             # The message codes are intended to be machine readable. The service will