# File lib/cgikit.rb, line 1553
                def check_conflicted_attributes( *attributes )
                        combination = []
                        attr = nil

                        attributes.each do | attr |
                                if definition.include? attr then
                                        combination << attr
                                end
                        end

                        if combination.size >= 2 then
                                _attr    = nil
                                string   = ''
                                pop1_str = combination.pop
                                pop2_str = combination.pop
        
                                combination.each do | _attr |
                                        string << "\"#{_attr}\", "
                                end
                                string << "\"#{pop2_str}\" or \"#{pop1_str}\""

                                msg = "Exactly one of #{string} must be bound - "
                                msg << name_with_class
                                raise AttributeError, msg
                        end
                end