Autogenerated update (2019-05-03)

Update:
- bigquery_v2
- calendar_v3
- cloudbuild_v1
- dialogflow_v2
- digitalassetlinks_v1
- dns_v2beta1
- iam_v1
- serviceconsumermanagement_v1
- servicenetworking_v1
- servicenetworking_v1beta
- serviceusage_v1
- serviceusage_v1beta1
- spanner_v1
- storage_v1
- youtube_partner_v1

generated/google/apis/storage_v1/classes.rb

@@ -1028,9 +1028,9 @@ module Google
         # @return [String]
         attr_accessor :kind
       
-        # Key metadata.
+        # JSON template to produce a JSON-style HMAC Key metadata resource.
         # Corresponds to the JSON property `metadata`
-        # @return [Object]
+        # @return [Google::Apis::StorageV1::HmacKeyMetadata]
         attr_accessor :metadata
       
         # HMAC secret key material.