# File lib/dm-core/associations/many_to_one.rb, line 9
      def self.setup(name, model, options = {})
        assert_kind_of 'name',    name,    Symbol
        assert_kind_of 'model',   model,   Model
        assert_kind_of 'options', options, Hash

        repository_name = model.repository.name

        model.class_eval "def \#{name}\n\#{name}_association.nil? ? nil : \#{name}_association\nend\n\ndef \#{name}=(parent)\n\#{name}_association.replace(parent)\nend\n\nprivate\n\ndef \#{name}_association\n@\#{name}_association ||= begin\nunless relationship = model.relationships(\#{repository_name.inspect})[:\#{name}]\nraise ArgumentError, \"Relationship \#{name.inspect} does not exist in \\\#{model}\"\nend\nassociation = Proxy.new(relationship, self)\nchild_associations << association\nassociation\nend\nend\n", __FILE__, __LINE__

        model.relationships(repository_name)[name] = Relationship.new(
          name,
          repository_name,
          model,
          options.fetch(:class_name, Extlib::Inflection.classify(name)),
          options
        )
      end