# File lib/puppet/external/event-loop/better-definers.rb, line 205
205:   def to_s
206:     if @attribute and @message
207:       "cannot change the value of `#@attribute': #@message"
208:     elsif @attribute
209:       "cannot change the value of `#@attribute'"
210:     elsif @message
211:       "cannot change the value of attribute: #@message"
212:     else
213:       "cannot change the value of attribute"
214:     end
215:   end