benchmarks/to_json.rb in dm-serializer-0.10.1 vs benchmarks/to_json.rb in dm-serializer-0.10.2

@@ -1,10 +1,10 @@
 require "rubygems"
 require 'pathname'
 require 'better-benchmark'
 
-gem 'dm-core', '0.10.1'
+gem 'dm-core', '0.10.2'
 require 'dm-core'
 
 spec_dir_path = Pathname(__FILE__).dirname.expand_path
 $LOAD_PATH.unshift(spec_dir_path.parent + 'lib/')
 require 'dm-serializer'
@@ -80,10 +80,10 @@
   property :composite, Integer, :key => true
   property :name,      String
   property :breed,     String
 
   has n, :baby_cows, :model => 'Cow'
-  belongs_to :mother_cow, :model => 'Cow', :nullable => true
+  belongs_to :mother_cow, :model => 'Cow', :required => false
 end
 
 DataMapper.auto_migrate!
 cow = Cow.create(
   :id        => 89,