# File lib/cgikit.rb, line 1846
        def definition_string
                unless @definition_string then
                        begin
                                f = File.new definition_file
                                @definition_string = f.readlines.join
                                f.close
                        rescue
                                msg = "Can't read a binding file - #{definition_file} #{self.class}"
                                raise FileNotFoundError, msg
                        end
                end

                @definition_string
        end