docs: update docs/dyn (#1096)

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diff --git a/docs/dyn/classroom_v1.registrations.html b/docs/dyn/classroom_v1.registrations.html
index 78be7ea..984982a 100644
--- a/docs/dyn/classroom_v1.registrations.html
+++ b/docs/dyn/classroom_v1.registrations.html
@@ -98,20 +98,20 @@
     The object takes the form of:
 
 { # An instruction to Classroom to send notifications from the `feed` to the provided destination.
+    "cloudPubsubTopic": { # A reference to a Cloud Pub/Sub topic. To register for notifications, the owner of the topic must grant `classroom-notifications@system.gserviceaccount.com` the `projects.topics.publish` permission. # The Cloud Pub/Sub topic that notifications are to be sent to.
+      "topicName": "A String", # The `name` field of a Cloud Pub/Sub [Topic](https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics#Topic).
+    },
+    "expiryTime": "A String", # The time until which the `Registration` is effective. This is a read-only field assigned by the server.
     "feed": { # A class of notifications that an application can register to receive. For example: "all roster changes for a domain". # Specification for the class of notifications that Classroom should deliver to the destination.
-      "courseRosterChangesInfo": { # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. This field must be specified if `feed_type` is `COURSE_ROSTER_CHANGES`.
-        "courseId": "A String", # The `course_id` of the course to subscribe to roster changes for.
-      },
       "courseWorkChangesInfo": { # Information about a `Feed` with a `feed_type` of `COURSE_WORK_CHANGES`. # Information about a `Feed` with a `feed_type` of `COURSE_WORK_CHANGES`. This field must be specified if `feed_type` is `COURSE_WORK_CHANGES`.
         "courseId": "A String", # The `course_id` of the course to subscribe to work changes for.
       },
       "feedType": "A String", # The type of feed.
-    },
-    "cloudPubsubTopic": { # A reference to a Cloud Pub/Sub topic. To register for notifications, the owner of the topic must grant `classroom-notifications@system.gserviceaccount.com` the `projects.topics.publish` permission. # The Cloud Pub/Sub topic that notifications are to be sent to.
-      "topicName": "A String", # The `name` field of a Cloud Pub/Sub [Topic](https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics#Topic).
+      "courseRosterChangesInfo": { # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. This field must be specified if `feed_type` is `COURSE_ROSTER_CHANGES`.
+        "courseId": "A String", # The `course_id` of the course to subscribe to roster changes for.
+      },
     },
     "registrationId": "A String", # A server-generated unique identifier for this `Registration`. Read-only.
-    "expiryTime": "A String", # The time until which the `Registration` is effective. This is a read-only field assigned by the server.
   }
 
   x__xgafv: string, V1 error format.
@@ -123,20 +123,20 @@
   An object of the form:
 
     { # An instruction to Classroom to send notifications from the `feed` to the provided destination.
+      "cloudPubsubTopic": { # A reference to a Cloud Pub/Sub topic. To register for notifications, the owner of the topic must grant `classroom-notifications@system.gserviceaccount.com` the `projects.topics.publish` permission. # The Cloud Pub/Sub topic that notifications are to be sent to.
+        "topicName": "A String", # The `name` field of a Cloud Pub/Sub [Topic](https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics#Topic).
+      },
+      "expiryTime": "A String", # The time until which the `Registration` is effective. This is a read-only field assigned by the server.
       "feed": { # A class of notifications that an application can register to receive. For example: "all roster changes for a domain". # Specification for the class of notifications that Classroom should deliver to the destination.
-        "courseRosterChangesInfo": { # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. This field must be specified if `feed_type` is `COURSE_ROSTER_CHANGES`.
-          "courseId": "A String", # The `course_id` of the course to subscribe to roster changes for.
-        },
         "courseWorkChangesInfo": { # Information about a `Feed` with a `feed_type` of `COURSE_WORK_CHANGES`. # Information about a `Feed` with a `feed_type` of `COURSE_WORK_CHANGES`. This field must be specified if `feed_type` is `COURSE_WORK_CHANGES`.
           "courseId": "A String", # The `course_id` of the course to subscribe to work changes for.
         },
         "feedType": "A String", # The type of feed.
-      },
-      "cloudPubsubTopic": { # A reference to a Cloud Pub/Sub topic. To register for notifications, the owner of the topic must grant `classroom-notifications@system.gserviceaccount.com` the `projects.topics.publish` permission. # The Cloud Pub/Sub topic that notifications are to be sent to.
-        "topicName": "A String", # The `name` field of a Cloud Pub/Sub [Topic](https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics#Topic).
+        "courseRosterChangesInfo": { # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. # Information about a `Feed` with a `feed_type` of `COURSE_ROSTER_CHANGES`. This field must be specified if `feed_type` is `COURSE_ROSTER_CHANGES`.
+          "courseId": "A String", # The `course_id` of the course to subscribe to roster changes for.
+        },
       },
       "registrationId": "A String", # A server-generated unique identifier for this `Registration`. Read-only.
-      "expiryTime": "A String", # The time until which the `Registration` is effective. This is a read-only field assigned by the server.
     }</pre>
 </div>