_client.erb in gapic-generator-0.9.0

- old
+ new

@@ -102,10 +102,10 @@
     enable_self_signed_jwt = @config.scope == <%= service.client_name %>.configure.scope &&
                              @config.endpoint == <%= service.client_name %>.configure.endpoint &&
                              !@config.endpoint.split(".").first.include?("-")
     credentials ||= Credentials.default scope: @config.scope,
                                         enable_self_signed_jwt: enable_self_signed_jwt
-    if credentials.is_a?(String) || credentials.is_a?(Hash)
+    if credentials.is_a?(::String) || credentials.is_a?(::Hash)
       credentials = Credentials.new credentials, scope: @config.scope
     end
     <%- end -%>
     @quota_project_id = @config.quota_project
     @quota_project_id ||= credentials.quota_project_id if credentials.respond_to? :quota_project_id