Only expose needed methods from API::Base

lib/api/base.rb

@@ -4,15 +4,16 @@ module API
   class Base < Grape::API::Instance # rubocop:disable API/Base
     include ::Gitlab::WithFeatureCategory
 
-    def self.feature_category_for_app(app)
+    class << self
+      def feature_category_for_app(app)
         feature_category_for_action(path_for_app(app))
       end
 
-    def self.path_for_app(app)
+      def path_for_app(app)
         normalize_path(app.namespace, app.options[:path].first)
       end
 
-    def self.route(methods, paths = ['/'], route_options = {}, &block)
+      def route(methods, paths = ['/'], route_options = {}, &block)
         if category = route_options.delete(:feature_category)
           feature_category(category, Array(paths).map { |path| normalize_path(namespace, path) })
         end
@@ -20,8 +21,11 @@ module API
         super
       end
 
-    def self.normalize_path(namespace, path)
+      private
+
+      def normalize_path(namespace, path)
         [namespace.presence, path.to_s.chomp('/').presence].compact.join('/')
       end
     end
+  end
 end