define_proxy_call

# File activemodel/lib/active_model/attribute_methods.rb, line 408
        def define_proxy_call(include_private, code_generator, name, target, *extra)
          defn = if NAME_COMPILABLE_REGEXP.match?(name)
            "def #{name}(*args)"
          else
            "define_method(:'#{name}') do |*args|"
          end

          extra = (extra.map!(&:inspect) << "*args").join(", ")

          body = if CALL_COMPILABLE_REGEXP.match?(target)
            "#{"self." unless include_private}#{target}(#{extra})"
          else
            "send(:'#{target}', #{extra})"
          end

          code_generator <<
            defn <<
            body <<
            "end" <<
            "ruby2_keywords(:'#{name}') if respond_to?(:ruby2_keywords, true)"
        end