README.md in n1_loader-1.3.0 vs README.md in n1_loader-1.4.0

@@ -186,25 +186,29 @@
 
 ```ruby
 class User
   include N1Loader::Loadable
 
-  n1_optimized :orders_count do |users, type|
-    orders_per_user = Order.where(type: type, user: users).group(:user_id).count
-
-    users.each { |user| fulfill(user, orders_per_user[user.id]) }
+  n1_optimized :orders_count do 
+    argument :type 
+    
+    def perform(users)
+      orders_per_user = Order.where(type: type, user: users).group(:user_id).count
+      
+      users.each { |user| fulfill(user, orders_per_user[user.id]) }
+    end
   end
 end
 
 user = User.new
-user.orders_count(:gifts) # The loader will be performed first time for this argument
-user.orders_count(:sales) # The loader will be performed first time for this argument
-user.orders_count(:gifts) # The cached value will be used
+user.orders_count(type: :gifts) # The loader will be performed first time for this argument
+user.orders_count(type: :sales) # The loader will be performed first time for this argument
+user.orders_count(type: :gifts) # The cached value will be used
 
 users = [User.new, User.new]
 N1Loader::Preloader.new(users).preload(:orders_count)
-users.map { |user| user.orders_count(:gifts) } # No N+1 here
+users.map { |user| user.orders_count(type: :gifts) } # No N+1 here
 ```
 
 _Note_: By default, we use `arguments.map(&:object_id)` to identify arguments but in some cases, 
 you may want to override it, for example:
 
@@ -215,20 +219,20 @@
   n1_optimized :orders_count do
     argument :sale 
     
     cache_key { sale.id }
     
-    def perform(users, sale)
+    def perform(users)
       orders_per_user = Order.where(sale: sale, user: users).group(:user_id).count
       
       users.each { |user| fulfill(user, orders_per_user[user.id]) }
     end
   end
 end
 
 user = User.new
-user.orders_count(Sale.first) # perform will be executed and value will be cached
-user.orders_count(Sale.first) # the cached value will be returned
+user.orders_count(sale: Sale.first) # perform will be executed and value will be cached
+user.orders_count(sale: Sale.first) # the cached value will be returned
 ```
 
 
 ## Integrations
 
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