# File lib/fog/openstack/requests/compute/set_metadata.rb, line 20
        def set_metadata(collection_name, parent_id, metadata = {})

          if collection_name == "images" then
            if not list_images_detail.body['images'].detect {|_| _['id'] == parent_id}
              raise Fog::Compute::OpenStack::NotFound
            end 
          end

          if collection_name == "servers" then
            if not list_servers_detail.body['servers'].detect {|_| _['id'] == parent_id}
              raise Fog::Compute::OpenStack::NotFound
            end 
          end

          response = Excon::Response.new
          response.body = { "metadata" => metadata }
          response.status = 200
          response

        end