define_method_attribute=

# File activemodel/lib/active_model/attributes.rb, line 45
        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 <<
              "def #{temp_method_name}(value)" <<
              "  _write_attribute(#{attr_name_expr}, value)" <<
              "end"
          end
        end