cattr_writer

# File activesupport/lib/active_support/core_ext/class/attribute_accessors.rb, line 52
  def cattr_writer(*syms)
    options = syms.extract_options!
    syms.each do |sym|
      class_eval(        unless defined? @@#{sym}          @@#{sym} = nil        end        def self.#{sym}=(obj)          @@#{sym} = obj        end, __FILE__, __LINE__ + 1)

      unless options[:instance_writer] == false || options[:instance_accessor] == false
        class_eval(          def #{sym}=(obj)            @@#{sym} = obj          end, __FILE__, __LINE__ + 1)
      end
      self.send("#{sym}=", yield) if block_given?
    end
  end