1 files changed, 11 insertions, 0 deletions
diff --git a/lib/gitlab/graphql/docs/renderer.rb b/lib/gitlab/graphql/docs/renderer.rb
index 497567f9389..ae0898e6198 100644
--- a/lib/gitlab/graphql/docs/renderer.rb
+++ b/lib/gitlab/graphql/docs/renderer.rb
@@ -24,6 +24,7 @@ module Gitlab
           @layout = Haml::Engine.new(File.read(template))
           @parsed_schema = GraphQLDocs::Parser.new(schema.graphql_definition, {}).parse
           @schema = schema
+          @seen = Set.new
         end
 
         def contents
@@ -37,6 +38,16 @@ module Gitlab
           FileUtils.mkdir_p(@output_dir)
           File.write(filename, contents)
         end
+
+        private
+
+        def seen_type?(name)
+          @seen.include?(name)
+        end
+
+        def seen_type!(name)
+          @seen << name
+        end
       end
     end
   end