    # File lib/yard/code_objects/namespace_object.rb, line 172
        def included_constants
          instance_mixins.inject([]) do |list, mixin|
            if mixin.respond_to? :constants
              list += mixin.constants.reject do |o|
                child(:name => o.name) || list.find {|o2| o2.name == o.name }
              end
            else
              list
            end
          end
        end