class ActiveFedora::Associations::Builder::CollectionAssociation

def self.wrap_scope(scope, mod)
  if scope
    if scope.arity.positive?
      proc { |owner| instance_exec(owner, &scope).extending(mod) }
    else
      proc { instance_exec(&scope).extending(mod) }
    end
  else
    proc { extending(mod) }
  end
end