client.rb in google-cloud-dataflow-v1beta3-0.2.0

- old
+ new

@@ -210,9 +210,20 @@
               metadata[:"x-goog-api-client"] ||= ::Gapic::Headers.x_goog_api_client \
                 lib_name: @config.lib_name, lib_version: @config.lib_version,
                 gapic_version: ::Google::Cloud::Dataflow::V1beta3::VERSION
               metadata[:"x-goog-user-project"] = @quota_project_id if @quota_project_id
 
+              header_params = {}
+              if request.project_id
+                header_params["project_id"] = request.project_id
+              end
+              if request.location
+                header_params["location"] = request.location
+              end
+
+              request_params_header = header_params.map { |k, v| "#{k}=#{v}" }.join("&")
+              metadata[:"x-goog-request-params"] ||= request_params_header
+
               options.apply_defaults timeout:      @config.rpcs.launch_flex_template.timeout,
                                      metadata:     metadata,
                                      retry_policy: @config.rpcs.launch_flex_template.retry_policy
 
               options.apply_defaults timeout:      @config.timeout,