# File lib/hash_attrs.rb, line 16
  def hash_writer(hash_sym, syms)
    syms.each do |id|
      id = id.to_s.downcase

      func = Proc.new do |val| 
        hash = instance_variable_get(hash_sym)
        hash[id.to_sym] = val 
      end

      self.send(:define_method, id+'=', func)
    end
  end