module Sequel::Plugins::AssociationProxies::ClassMethods

def def_association_method(opts)

directly.
Changes the association method to return a proxy instead of the associated objects 
def def_association_method(opts)
  opts.returns_array? ? association_module_def(opts.association_method, opts){|*r| AssociationProxy.new(self, opts, r[0])} : super
end