# File lib/puppet/util/warnings.rb, line 21
21:   def self.maybe_log(message, klass)
22:     @stampwarnings ||= {}
23:     @stampwarnings[klass] ||= []
24:     return nil if @stampwarnings[klass].include? message
25:     yield
26:     @stampwarnings[klass] << message
27:     nil
28:   end