module ActiveModel::Attributes::ClassMethods

def define_method_attribute=(name, owner:)
  ActiveModel::AttributeMethods::AttrNames.define_attribute_accessor_method(
    owner, name, writer: true,
  ) do |temp_method_name, attr_name_expr|
    owner.define_cached_method("#{name}=", as: temp_method_name, namespace: :active_model) do |batch|
      batch <<
        "def #{temp_method_name}(value)" <<
        "  _write_attribute(#{attr_name_expr}, value)" <<
        "end"
    end
  end
end