Replace dynamic method receptor with dynamic method definition

object_creation_methods.diff

   private

-  def method_missing(method, *args)
-    if method.to_s =~ /^create_(.+)$/
-      send("new_#{$1}", *args).tap(&:save!)
-    else
-      super
-    end
+  def self.included(base)
+    ObjectCreationMethods.public_instance_methods(false).each do |new_method_name|
+      next unless new_method_name.to_s =~ /^new_(.+)$/
+      create_method_name = "create_#{$1}"
+      base.module_eval <<-RUBY
+        def #{create_method_name}(overrides = {})       # def create_foo(overrides = {})
+          #{new_method_name}(overrides).tap(&:save!)    #   new_foo(overrides).tap(&:save!)
+        end                                             # end
+      RUBY
+    end
   end