diff --git a/generated/google/apis/firestore_v1beta1.rb b/generated/google/apis/firestore_v1beta1.rb
index f46e147b7..c54c25145 100644
--- a/generated/google/apis/firestore_v1beta1.rb
+++ b/generated/google/apis/firestore_v1beta1.rb
@@ -26,7 +26,7 @@ module Google
     # @see https://cloud.google.com/firestore
     module FirestoreV1beta1
       VERSION = 'V1beta1'
-      REVISION = '20191019'
+      REVISION = '20191206'
 
       # View and manage your data across Google Cloud Platform services
       AUTH_CLOUD_PLATFORM = 'https://www.googleapis.com/auth/cloud-platform'
diff --git a/generated/google/apis/firestore_v1beta1/classes.rb b/generated/google/apis/firestore_v1beta1/classes.rb
index 7ccf28e50..a549cb3da 100644
--- a/generated/google/apis/firestore_v1beta1/classes.rb
+++ b/generated/google/apis/firestore_v1beta1/classes.rb
@@ -1552,7 +1552,7 @@ module Google
       class RollbackRequest
         include Google::Apis::Core::Hashable
       
-        # The transaction to roll back.
+        # Required. The transaction to roll back.
         # Corresponds to the JSON property `transaction`
         # NOTE: Values are automatically base64 encoded/decoded in the client library.
         # @return [String]
diff --git a/generated/google/apis/firestore_v1beta1/service.rb b/generated/google/apis/firestore_v1beta1/service.rb
index de5353594..d8a70cb33 100644
--- a/generated/google/apis/firestore_v1beta1/service.rb
+++ b/generated/google/apis/firestore_v1beta1/service.rb
@@ -131,7 +131,7 @@ module Google
         # Documents returned by this method are not guaranteed to be returned in the
         # same order that they were requested.
         # @param [String] database
-        #   The database name. In the format:
+        #   Required. The database name. In the format:
         #   `projects/`project_id`/databases/`database_id``.
         # @param [Google::Apis::FirestoreV1beta1::BatchGetDocumentsRequest] batch_get_documents_request_object
         # @param [String] fields
@@ -165,7 +165,7 @@ module Google
         
         # Starts a new transaction.
         # @param [String] database
-        #   The database name. In the format:
+        #   Required. The database name. In the format:
         #   `projects/`project_id`/databases/`database_id``.
         # @param [Google::Apis::FirestoreV1beta1::BeginTransactionRequest] begin_transaction_request_object
         # @param [String] fields
@@ -199,7 +199,7 @@ module Google
         
         # Commits a transaction, while optionally updating documents.
         # @param [String] database
-        #   The database name. In the format:
+        #   Required. The database name. In the format:
         #   `projects/`project_id`/databases/`database_id``.
         # @param [Google::Apis::FirestoreV1beta1::CommitRequest] commit_request_object
         # @param [String] fields
@@ -233,12 +233,13 @@ module Google
         
         # Creates a new document.
         # @param [String] parent
-        #   The parent resource. For example:
+        #   Required. The parent resource. For example:
         #   `projects/`project_id`/databases/`database_id`/documents` or
         #   `projects/`project_id`/databases/`database_id`/documents/chatrooms/`
         #   chatroom_id``
         # @param [String] collection_id
-        #   The collection ID, relative to `parent`, to list. For example: `chatrooms`.
+        #   Required. The collection ID, relative to `parent`, to list. For example: `
+        #   chatrooms`.
         # @param [Google::Apis::FirestoreV1beta1::Document] document_object
         # @param [String] document_id
         #   The client-assigned document ID to use for this document.
@@ -280,7 +281,7 @@ module Google
         
         # Deletes a document.
         # @param [String] name
-        #   The resource name of the Document to delete. In the format:
+        #   Required. The resource name of the Document to delete. In the format:
         #   `projects/`project_id`/databases/`database_id`/documents/`document_path``.
         # @param [Boolean] current_document_exists
         #   When set to `true`, the target document must exist.
@@ -319,7 +320,7 @@ module Google
         
         # Gets a single document.
         # @param [String] name
-        #   The resource name of the Document to get. In the format:
+        #   Required. The resource name of the Document to get. In the format:
         #   `projects/`project_id`/databases/`database_id`/documents/`document_path``.
         # @param [Array<String>, String] mask_field_paths
         #   The list of field paths in the mask. See Document.fields for a field
@@ -361,14 +362,15 @@ module Google
         
         # Lists documents.
         # @param [String] parent
-        #   The parent resource name. In the format:
+        #   Required. The parent resource name. In the format:
         #   `projects/`project_id`/databases/`database_id`/documents` or
         #   `projects/`project_id`/databases/`database_id`/documents/`document_path``.
         #   For example:
         #   `projects/my-project/databases/my-database/documents` or
         #   `projects/my-project/databases/my-database/documents/chatrooms/my-chatroom`
         # @param [String] collection_id
-        #   The collection ID, relative to `parent`, to list. For example: `chatrooms`
+        #   Required. The collection ID, relative to `parent`, to list. For example: `
+        #   chatrooms`
         #   or `messages`.
         # @param [Array<String>, String] mask_field_paths
         #   The list of field paths in the mask. See Document.fields for a field
@@ -428,7 +430,7 @@ module Google
         
         # Lists all the collection IDs underneath a document.
         # @param [String] parent
-        #   The parent document. In the format:
+        #   Required. The parent document. In the format:
         #   `projects/`project_id`/databases/`database_id`/documents/`document_path``.
         #   For example:
         #   `projects/my-project/databases/my-database/documents/chatrooms/my-chatroom`
@@ -464,7 +466,7 @@ module Google
         
         # Listens to changes.
         # @param [String] database
-        #   The database name. In the format:
+        #   Required. The database name. In the format:
         #   `projects/`project_id`/databases/`database_id``.
         # @param [Google::Apis::FirestoreV1beta1::ListenRequest] listen_request_object
         # @param [String] fields
@@ -548,7 +550,7 @@ module Google
         
         # Rolls back a transaction.
         # @param [String] database
-        #   The database name. In the format:
+        #   Required. The database name. In the format:
         #   `projects/`project_id`/databases/`database_id``.
         # @param [Google::Apis::FirestoreV1beta1::RollbackRequest] rollback_request_object
         # @param [String] fields
@@ -582,7 +584,7 @@ module Google
         
         # Runs a query.
         # @param [String] parent
-        #   The parent resource name. In the format:
+        #   Required. The parent resource name. In the format:
         #   `projects/`project_id`/databases/`database_id`/documents` or
         #   `projects/`project_id`/databases/`database_id`/documents/`document_path``.
         #   For example:
@@ -620,7 +622,7 @@ module Google
         
         # Streams batches of document updates and deletes, in order.
         # @param [String] database
-        #   The database name. In the format:
+        #   Required. The database name. In the format:
         #   `projects/`project_id`/databases/`database_id``.
         #   This is only required in the first message.
         # @param [Google::Apis::FirestoreV1beta1::WriteRequest] write_request_object