# File lib/map.rb, line 89
    def add_conversion_method!(method)
      if define_conversion_method!(method)
        method = method.to_s.strip
        raise ArguementError if method.empty?
        module_eval("unless conversion_methods.include?(\#{ method.inspect })\nconversion_methods.unshift(\#{ method.inspect })\nend\n", __FILE__, __LINE__)
        true
      else
        false
      end
    end